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Iron-rich (3 and 11.3 wt.% Fe2O3) hausmannite is anomalously strongly magnetic (Wessels mine).","Manganese ore deposit.","Gottingen, Germany, number GZG.MIN.4.2.23.14 (type).","Forms a series with hetaerolite.\r\n\r\nHausmannite has a tetragonal distorted spinel structure (due to the Jahn-Teller distortion of the Mn3+-centred polyhedron). When heated above 1473 K, a cubic high-temperature phase appears (Frenzel 1980).\r\n\r\nHausmann...","Originally named \"blättricher Schwarz-Braunstein\" in 1813 by Johann Friedrich Ludwig Hausmann, Professor of Mineralogy, University of Göttingen, Germany (February 22, 1782, Hanover, Germany - December 26, 1859, Göttingen, Germany). Renamed by Wilhelm Haidinger in 1827 in honor of Hausmann.","2025-08-11 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Langewiesen, Ilmenau, Ilm District, Thuringia, Germany",50.66,10.9441667,"Germany",309,[317,321,325,329,332,335,339,343,347,351,355,360,364,368,372,377,382,386,390,394,399,404,409,414,419,423,428,432,437,442],{"id":318,"year":319,"html":320,"doi":11},17557205,1813,"Hausmann, Johann Friedrich Ludwig (1813) \u003Ci>Handbuch der Mineralogie\u003C\u002Fi> (1st ed.). Vandenhoeck und Ruprecht. \u003Ca target='_blank' href='https:\u002F\u002Farchive.org\u002Fdownload\u002Fhandbuchdermine01hausgoog\u002Fhandbuchdermine01hausgoog.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":322,"year":323,"html":324,"doi":11},16111517,1827,"Haidinger, W. (1827) Royal Society of Edinburgh, Transactions: 11: 127.",{"id":326,"year":327,"html":328,"doi":11},16103885,1828,"Haidinger, W. (1828): Mineralogische Beschreibung der Manganerze. I. Prismatoïdisches Manganerz, Manganit. II. Pyramidales Manganerz, Hausmannit. III. Untheilbares Manganerz, Psilomelan. IV. Brachytypes Manganerz, Braunit. V. Prismatisches Manganerz, Pyrolusit.- Poggendorffs Annalen der Physik und Chemie 14, 197-211",{"id":330,"year":327,"html":331,"doi":11},16111519,"Turner, E. (1828) Chemical examination of the oxides of manganese. Part II. On the composition of the ores of manganese described by Mr. Haidinger. The Philosophical Magazine: 4: 96-104.",{"id":333,"year":310,"html":334,"doi":11},16111520,"Haidinger, M.W. (1831) II. Pyramidal Manganese-ore Hausmannite. Transactions of the Royal Society of Edinburgh: 11: 127-129.",{"id":336,"year":337,"html":338,"doi":11},16111521,1865,"Rammelsberg, J. (1865) Ann. Phys.: 124: 521.",{"id":340,"year":162,"html":341,"doi":342},399273,"Gorgeu, Alex. (1883) Sur la production artificielle de la hausmannite. \u003Ci>Bulletin de Minéralogie\u003C\u002Fi>,  6 (5) 136-139 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1883.1807'>doi:10.3406\u002Fbulmi.1883.1807\u003C\u002Fa>","10.3406\u002Fbulmi.1883.1807",{"id":344,"year":345,"html":346,"doi":11},16111522,1888,"Flink, G. (1888) Ak Stockholm, Bh.: 12(7): 40.",{"id":348,"year":349,"html":350,"doi":11},16111523,1908,"Koechlin (1908) Über Hausmannit und Braunitkrystalle von Brasilien. Min. Mitt.: 27: 262.",{"id":352,"year":353,"html":354,"doi":11},16111524,1920,"Miser, H.D., Fairchild, J.G. (1920) Hausmannite in the Batesville district, Arkansas. Washington Academy of Science Journal: 10(1): 1-8.",{"id":356,"year":357,"html":358,"doi":359},103858,1926,"Aminoff, G. (1926) Über die Kristallstruktur von Hausmannit (MnMn2O4). \u003Ci>Zeitschrift für Kristallographie\u003C\u002Fi>,  64 (1). 475-490 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1926.64.1.475'>doi:10.1524\u002Fzkri.1926.64.1.475\u003C\u002Fa>","10.1524\u002Fzkri.1926.64.1.475",{"id":361,"year":362,"html":363,"doi":11},16111526,1932,"Krüll (1932) Chem. Erde: 7: 473.",{"id":365,"year":366,"html":367,"doi":11},16111527,1944,"Palache, C., Berman, H., Frondel, C. (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 707: 712-715.",{"id":369,"year":370,"html":371,"doi":11},523006,1958,"Hook, H. J. Van, Keith, M. L. (1958) The system Fe3O4-Mn3O4. \u003Ci>American Mineralogist\u003C\u002Fi>,  43 (1-2) 69-83 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM43\u002FAM43_69.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":373,"year":374,"html":375,"doi":376},11183648,1961,"Satomi, Ken'iti (1961) Oxygen Positional Parameters of Tetragonal Mn3O4. \u003Ci>Journal of the Physical Society of Japan\u003C\u002Fi>, 16 (2). 258-266 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1143\u002Fjpsj.16.258'>doi:10.1143\u002Fjpsj.16.258\u003C\u002Fa>","10.1143\u002Fjpsj.16.258",{"id":378,"year":379,"html":380,"doi":381},230946,1972,"Hewett, D. F. (1972) Manganite, hausmannite, braunite: Features, modes of Origin. \u003Ci>Economic Geology\u003C\u002Fi>,  67 (1). 83-102 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2113\u002Fgsecongeo.67.1.83'>doi:10.2113\u002Fgsecongeo.67.1.83\u003C\u002Fa>","10.2113\u002Fgsecongeo.67.1.83",{"id":383,"year":384,"html":385,"doi":11},16111529,1974,"Neues Jahrbuch für Mineralogie, Monatshefte (1974) 375.",{"id":387,"year":388,"html":389,"doi":11},16111530,1980,"Frenzel, G. (1980) The manganese ore minerals. In I.M. Varentsov and G. Grassely, Eds., The geology and geochemistry of manganese, Schweizerbarth, Stuttgart, p. 25.",{"id":391,"year":388,"html":392,"doi":393},577376,"Pollert, Emil (1980) Tetragonal-to-cubic transformation of hausmannite. \u003Ci>Journal of Solid State Chemistry\u003C\u002Fi>,  33. 305-308 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002F0022-4596(80)90150-4'>doi:10.1016\u002F0022-4596(80)90150-4\u003C\u002Fa>","10.1016\u002F0022-4596(80)90150-4",{"id":395,"year":396,"html":397,"doi":398},16408812,1984,"Barbariol, Iginio, Roitti, Sergio (1984) An electroconductometric investigation of Mn3O4 and the Mn3O4-Mn2O3 transformation. \u003Ci>Journal of Materials Science Letters\u003C\u002Fi>,  3 (2). 181-183 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf00723109'>doi:10.1007\u002Fbf00723109\u003C\u002Fa>","10.1007\u002Fbf00723109",{"id":400,"year":401,"html":402,"doi":403},15687,1987,"Jarosch, D. (1987) Crystal structure refinement and reflectance measurements of hausmannite, Mn\u003Csub>3\u003C\u002Fsub>O\u003Csub>4\u003C\u002Fsub>. \u003Ci>Mineralogy and Petrology\u003C\u002Fi>,  37 (1) 15-23 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf01163155'>doi:10.1007\u002Fbf01163155\u003C\u002Fa>","10.1007\u002Fbf01163155",{"id":405,"year":406,"html":407,"doi":408},146382,1988,"Cornell, R. M. (1988) Transformation of Hausmannite into Birnessite in Alkaline Media. \u003Ci>Clays and Clay Minerals\u003C\u002Fi>,  36 (3) 249-257 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1346\u002Fccmn.1988.0360306'>doi:10.1346\u002Fccmn.1988.0360306\u003C\u002Fa>","10.1346\u002Fccmn.1988.0360306",{"id":410,"year":411,"html":412,"doi":413},2699,1995,"Gutzmer, J., Beukes, N. J., Kleyenstuber, A. S. E., Burger, A. M. (1995) Magnetic hausmannite from hydrothermally altered manganese ore in the Palaeoproterozoic Kalahari manganese deposit, Transvaal Supergroup, South Africa. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  59 (397). 703-716 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1995.059.397.12'>doi:10.1180\u002Fminmag.1995.059.397.12\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_59\u002F59-397-703.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1995.059.397.12",{"id":415,"year":416,"html":417,"doi":418},393803,1998,"Baron, V., Gutzmer, J., Rundlof, H., Tellgren, R. (1998) The influence of iron substitution in the magnetic properties of hausmannite, Mn\u003Csup>2+\u003C\u002Fsup>(Fe,Mn)\u003Csup>3+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>O\u003Csub>4\u003C\u002Fsub>. \u003Ci>American Mineralogist\u003C\u002Fi>,  83 (7-8). 786-793 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-1998-7-810'>doi:10.2138\u002Fam-1998-7-810\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fam\u002Fvol83\u002FAM83_786.pdf' class='refpdflink'>\u003C\u002Fa>","10.2138\u002Fam-1998-7-810",{"id":420,"year":416,"html":421,"doi":422},13481689,"Fritsch, S, Sarrias, J, Rousset, A, Kulkarni, G.U (1998) Low-temperature oxidation of Mn3O4 hausmannite. \u003Ci>Materials Research Bulletin\u003C\u002Fi>,  33 (8). 1185-1194 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002Fs0025-5408(98)00108-1'>doi:10.1016\u002Fs0025-5408(98)00108-1\u003C\u002Fa>","10.1016\u002Fs0025-5408(98)00108-1",{"id":424,"year":425,"html":426,"doi":427},3052182,2001,"Gillot, B, El Guendouzi, M, Laarj, M (2001) Particle size effects on the oxidation–reduction behavior of Mn3O4 hausmannite. \u003Ci>Materials Chemistry and Physics\u003C\u002Fi>, 70. 54-60 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002Fs0254-0584(00)00473-9'>doi:10.1016\u002Fs0254-0584(00)00473-9\u003C\u002Fa>","10.1016\u002Fs0254-0584(00)00473-9",{"id":429,"year":430,"html":431,"doi":11},16964758,2005,"(2005) Hausmannite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fhausmannite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":433,"year":434,"html":435,"doi":436},7736019,2019,"Antao, Sytle M., Cruickshank, Laura A., Hazrah, Kaveer S. (2019) Structural Trends and Solid-Solutions Based on the Crystal Chemistry of Two Hausmannite (Mn3O4) Samples from the Kalahari Manganese Field. \u003Ci>Minerals\u003C\u002Fi>, 9 (6) 343 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3390\u002Fmin9060343'>doi:10.3390\u002Fmin9060343\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Fwww.mdpi.com\u002F2075-163X\u002F9\u002F6\u002F343\u002Fpdf?version=1559727604' class='refpdflink'>\u003C\u002Fa>","10.3390\u002Fmin9060343",{"id":438,"year":439,"html":440,"doi":441},8133841,2020,"Bernardini, Simone, Bellatreccia, Fabio, Della Ventura, Giancarlo, Ballirano, Paolo, Sodo, Armida (2020) Raman spectroscopy and laser-induced degradation of groutellite and ramsdellite, two cathode materials of technological interest. \u003Ci>RSC Advances\u003C\u002Fi>, 10 (2). 923-929 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1039\u002Fc9ra08662e'>doi:10.1039\u002Fc9ra08662e\u003C\u002Fa>","10.1039\u002Fc9ra08662e",{"id":443,"year":444,"html":445,"doi":446},18616961,2025,"Song, Boyoung; Rashid, Mohammad M.; Elzinga, Evert J.; Kim, Bojeong (2025) Impacts of Structural Impurities and Solution pH on Hausmannite Transformation to Birnessite: Environmental Implications for Metal Solubility and Sequestration. \u003Ci>Minerals\u003C\u002Fi>,  15 (7).  \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3390\u002Fmin15070697'>doi:10.3390\u002Fmin15070697\u003C\u002Fa>","10.3390\u002Fmin15070697",[448,458,465,473,479,487,494,502,510,518,525,533,543,548,556,564,572,578,585,593,601,606,610,617,624,631,637,642,649,656,664,671],{"id":449,"source_url":450,"license_code":451,"credit_html":452,"title":453,"description":454,"author":455,"original_width":456,"original_height":457},10932,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140196","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140196\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-120647.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>SHARP, very equant, mirror-lustrous cluster of the highest quality! 3.1 x 2.7 x 2.0 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",780,800,{"id":459,"source_url":460,"license_code":461,"credit_html":462,"title":7,"description":11,"author":11,"original_width":463,"original_height":464},29841,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F91546","CC BY-SA 4.0","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F91546\" rel=\"noopener\">The Estonian Museum of Natural History\u003C\u002Fa> via Europeana",1000,916,{"id":466,"source_url":467,"license_code":451,"credit_html":468,"title":469,"description":470,"author":455,"original_width":471,"original_height":472},10933,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10141566","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10141566\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-131901.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.8 x 4.3 x 3.5 cm.\u003C\u002Fdd>\n\u003Cdd>Sharp, lustrous, pagoda-like hausmannite crystals …classic Wessels Mine material, and a rich cluster at that. Ex. Charlie Key Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",600,462,{"id":474,"source_url":475,"license_code":476,"credit_html":477,"title":7,"description":11,"author":11,"original_width":463,"original_height":478},29842,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F113120","CC BY 4.0","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F113120\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",666,{"id":480,"source_url":481,"license_code":451,"credit_html":482,"title":483,"description":484,"author":455,"original_width":485,"original_height":486},10934,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10154574","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10154574\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-187676.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 1.6 x 1.6 x 1.5 cm.\u003C\u002Fdd>\n\u003Cdd>Razor-sharp, mirror-lustre, tetragonal hasumannite crystals, dominated by the largest pyramid form a fine thumbnail cluster from the Wessels Mine of South Africa.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",383,405,{"id":488,"source_url":489,"license_code":451,"credit_html":490,"title":491,"description":492,"author":455,"original_width":471,"original_height":493},10935,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161477","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161477\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-215565.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 8.4 x 5.8 x 3.7 cm.\u003C\u002Fdd>\n\u003Cdd>A dramatic specimen with a ridge of large, highly lustrous hausmannite on matrix, accented with calcite, from this famous mine which has produced unarguably the world’s best of species. The two central crystals, upon which others are stacked like a pagoda tower, are an inch apiece. These are very good crystals of high quality and unusually well displayed. Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",417,{"id":495,"source_url":496,"license_code":451,"credit_html":497,"title":498,"description":499,"author":455,"original_width":500,"original_height":501},10936,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174275","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174275\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-290166.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 10 x 5.7 x 4 cm.\u003C\u002Fdd>\n\u003Cdd>An imposing and impressive cluster of sharp and highly lustrous Hausmannite crystals on Manganite matrix. The cluster is a full 9 cm long, and the individual crystals (there are a hundred) maintain their identity well though they flow into one another. The largest of the mirror-like Hausmannites is a good 1 cm on edge. It is much better in person, as shooting black against black is tough. A terrific specimen from the famous Wessels Mine. Very 3-dimensional and nearly pristine. Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",444,460,{"id":503,"source_url":504,"license_code":451,"credit_html":505,"title":506,"description":507,"author":455,"original_width":508,"original_height":509},10938,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10443522","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10443522\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-4mb32b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 2.5 X 2.1 X 2.1 cm\n\u003Cdl>\u003Cdt>HAUSMANNITE\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Large 1.8 cm modified octahedron with very good luster and interesting stepped growth form.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",360,330,{"id":511,"source_url":512,"license_code":451,"credit_html":513,"title":514,"description":515,"author":455,"original_width":516,"original_height":517},10939,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450426","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450426\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-k205b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 3.1 x 2.7 x 2.0 cm\n\u003Cdl>\u003Cdt>Hausmannite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>SHARP, very equant, mirror-lustrous cluster of the highest quality!\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",400,365,{"id":519,"source_url":520,"license_code":451,"credit_html":521,"title":522,"description":523,"author":455,"original_width":516,"original_height":524},10937,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10418451","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10418451\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Andradite-Hausmannite-ww14d.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAndradite\" class=\"extiw\" title=\"en:Andradite\">Andradite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 2.6 x 2.5 x 2.1 cm\n\u003Cdl>\u003Cdt>Hausmannite on Andradite garnet\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A fantastic 1.8 cm-on-edge crystal of Hausmannite sitting perfectly on a bed of red crystalline garnets. The Hausmannite has excellent sub-metallic luster, and is growing in its classic pseudo-octahedral form. There are even advanced late-stage pseudo-octahedrons forming on some of the corners. This is a superb and aesthetic specimen. Ex. Wendell E. Wilson Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",387,{"id":526,"source_url":527,"license_code":476,"credit_html":528,"title":529,"description":530,"author":531,"original_width":353,"original_height":532},3950,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=130468886","Henk Smeets – tomeikminerals.com, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=130468886\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Britvinite hausmannite AndreRobbemond FOV3mm-0.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBritvinite\" class=\"extiw\" title=\"en:Britvinite\">Britvinite\u003C\u002Fa> with \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Field of view: 3 mm\u003C\u002Fdd>\n\u003Cdd>Locality: Långban, Filipstad, Vårmland, Sweden\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Henk Smeets – tomeikminerals.com",1282,{"id":534,"source_url":535,"license_code":536,"credit_html":537,"title":538,"description":539,"author":540,"original_width":541,"original_height":542},4812,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=118200692","CC BY-SA 2.0","Pacific Museum of Earth from Canada, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=118200692\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Caryinite with Hausmannite and Calcite (48140105038).jpg","Langban, Sweden","Pacific Museum of Earth from Canada",4000,6000,{"id":544,"source_url":545,"license_code":536,"credit_html":546,"title":547,"description":539,"author":540,"original_width":542,"original_height":541},8934,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=118200401","Pacific Museum of Earth from Canada, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=118200401\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Finnemanite with Hausmannite (48140064093).jpg",{"id":549,"source_url":550,"license_code":451,"credit_html":551,"title":552,"description":553,"author":455,"original_width":554,"original_height":555},10941,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10171218","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10171218\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-Andradite-272649.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAndradite\" class=\"extiw\" title=\"en:Andradite\">Andradite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.2 x 6.1 x 1.8 cm.\u003C\u002Fdd>\n\u003Cdd>This is a superb Hausmannites specimen. The tetragonal pyramids, up to nearly 1 cm on edge, are razor-sharp and highly lustrous. One large crystal has an old cleave, that seems to be partially re-healed and is grown over by later crystals, presenting an unusual broad face. One of the truly great things about the specimen is that pyramidal-looking crystals retain their individuality. They are not intergrown like you see on many Hausmannites. This is an exceptional specimen, not only for the quality of the Hausmannite crystals but the fine combination that you find it in. It is likely that the fine pink microcrystals are Andradite garnet, a rare and unique association. Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",500,464,{"id":557,"source_url":558,"license_code":461,"credit_html":559,"title":560,"description":561,"author":562,"original_width":384,"original_height":563},12237,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=75818248","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=75818248\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Inesite, hausmannite.jpg","Inesite, hausmannite : Hale Creek Mine, Mad River Rock, Coastal Range, Trinity Co., California, USA","Géry PARENT",1316,{"id":565,"source_url":566,"license_code":451,"credit_html":567,"title":568,"description":569,"author":455,"original_width":570,"original_height":571},15143,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=74299421","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=74299421\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Magnussonite, Allactite, Hausmannite, Dolomite-762319.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMagnussonite\" class=\"extiw\" title=\"en:Magnussonite\">Magnussonite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAllactite\" class=\"extiw\" title=\"en:Allactite\">Allactite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDolomite\" class=\"extiw\" title=\"en:Dolomite\">Dolomite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FL%C3%A5ngban\" class=\"extiw\" title=\"en:Långban\">Långban\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFilipstad\" class=\"extiw\" title=\"en:Filipstad\">Filipstad\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FV%C3%A4rmland\" class=\"extiw\" title=\"en:Värmland\">Värmland\u003C\u002Fa>, Sweden (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"https:\u002F\u002Fwww.mindat.org\u002Floc-3167.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Dimensions: 7.0 cm x 6.5 cm x 2.0 cm\u003C\u002Fdd>\n\u003Cdd>A very good specimen of hausmannite-dolomite ore exhibiting a fracture surface coated with relatively coarse, inter-grown blades of dark pink allactite and scattered patches of emerald-green magnussonite. Allactite is an uncommon manganese arsenate hydroxide. From Langban, Filipstad, Varmland, Sweden, the type locality for magnussonite, a manganese arsenite. Ex. Paulo Matioli and Swedish Natural History Museum collections with labels.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",1386,1134,{"id":573,"source_url":574,"license_code":451,"credit_html":575,"title":576,"description":569,"author":455,"original_width":577,"original_height":463},15144,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=74299423","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=74299423\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Magnussonite, Allactite, Hausmannite, Dolomite-762320.jpg",1500,{"id":579,"source_url":580,"license_code":451,"credit_html":581,"title":582,"description":569,"author":455,"original_width":583,"original_height":584},15145,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=74299427","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=74299427\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Magnussonite, Allactite, Hausmannite, Dolomite-762321.jpg",1439,1172,{"id":586,"source_url":587,"license_code":451,"credit_html":588,"title":589,"description":590,"author":455,"original_width":591,"original_height":592},18491,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10172045","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10172045\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Ettringite-Oyelite-Hausmannite-279139.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEttringite\" class=\"extiw\" title=\"en:Ettringite\">Ettringite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOyelite\" class=\"extiw\" title=\"en:Oyelite\">Oyelite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-55925.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Small cabinet. Three major crystals dominate the top of this matrix plate of hausmannite, smothered by a soft carpet of oyelite. The two frontal crystals are 4 cm long, and a 5 cm crystal runs under them, linking them all together in a chain of color. A larger, thicker, broken-off crystal is a backstop at the base of the cluster.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",710,1024,{"id":594,"source_url":595,"license_code":451,"credit_html":596,"title":597,"description":598,"author":599,"original_width":471,"original_height":600},27737,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11973661","Thomas Witzke, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=11973661\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Wakefieldite-(La) , Hausmannite - Grube Glücksstern, Gottlob, Thüringen.jpg","Pale brown prismatic crystals of \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FWakefieldite-(La)\" class=\"extiw\" title=\"en:Wakefieldite-(La)\">Wakefieldite-(La)\u003C\u002Fa> (Picture size: 3 mm)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Glücksstern Mine, Gottlob, Friedrichroda, Thuringia, Germany\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Thomas Witzke",450,{"id":602,"source_url":603,"license_code":476,"credit_html":604,"title":7,"description":11,"author":11,"original_width":463,"original_height":605},29853,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F182222","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F182222\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",754,{"id":607,"source_url":608,"license_code":476,"credit_html":609,"title":7,"description":11,"author":11,"original_width":463,"original_height":478},30467,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F118777","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F118777\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",{"id":611,"source_url":612,"license_code":451,"credit_html":613,"title":614,"description":615,"author":455,"original_width":616,"original_height":554},32933,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174158","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174158\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-Andradite-289977.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAndradite\" class=\"extiw\" title=\"en:Andradite\">Andradite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 2.5 x 2.2 x 1.8 cm.\u003C\u002Fdd>\n\u003Cdd>An outstanding thumbnail of intergrown and complex Hausmannite crystals. The complex and slightly stepped crystal faces create an attractive, almost 'snowflake' effect with the shimmering luster and overall shape. Incredibly aesthetic. Trace micro Andradite Garnets are also present. The crystals are about .7 cm on edge. Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",431,{"id":618,"source_url":619,"license_code":451,"credit_html":620,"title":621,"description":622,"author":455,"original_width":471,"original_height":623},36645,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161453","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161453\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-Datolite-215535.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FDatolite\" class=\"extiw\" title=\"en:Datolite\">Datolite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 4.3 x 3.0 x 2.7 cm.\u003C\u002Fdd>\n\u003Cdd>These are nice, sharp, jet-black hausmannite crystals arranged in a beautiful pagoda-like structure - but even better is the fact that they are sitting in pink datolite. The contrast is stunning, and totally unexpected. Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",486,{"id":625,"source_url":626,"license_code":451,"credit_html":627,"title":628,"description":629,"author":455,"original_width":630,"original_height":592},53803,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10172037","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10172037\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Ettringite-Hausmannite-279134.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEttringite\" class=\"extiw\" title=\"en:Ettringite\">Ettringite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-55925.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.3 x 2.3 x 2.2 cm.\u003C\u002Fdd>\n\u003Cdd>A sharp miniature with vivid contrasts. This cluster of upright ettringites is host to a crust of brilliantly sparkling, micro-hausmannite crystals on one side. All is perched on a thin shard of calcite and hausmannite-covered matrix. A really nice, elegant miniature, with good color and translucency, representative of this new find.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",682,{"id":632,"source_url":633,"license_code":451,"credit_html":634,"title":635,"description":636,"author":455,"original_width":493,"original_height":471},66059,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10148187","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10148187\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-Manganvesuvianite-Baryte-163240.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FManganvesuvianite\" class=\"extiw\" title=\"en:Manganvesuvianite\">Manganvesuvianite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaryte\" class=\"extiw\" title=\"en:Baryte\">Baryte\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 3.9 x 3.0 x 2.0 cm.\u003C\u002Fdd>\n\u003Cdd>A sharp, lustrous, jet black hausmannite crystal perched on matrix and associated with GEMMY, SHARP, manganvesuvianite crystals - a rare combo! The associated mineral is baryte, for great contrast and display. A superb little specimen with lots of character Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":638,"source_url":639,"license_code":451,"credit_html":640,"title":641,"description":636,"author":455,"original_width":457,"original_height":555},66060,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10148188","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10148188\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hausmannite-Manganvesuvianite-Baryte-163241.jpg",{"id":643,"source_url":644,"license_code":451,"credit_html":645,"title":646,"description":647,"author":455,"original_width":554,"original_height":648},71379,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140304","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140304\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Olmiite-Hausmannite-120800.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOlmiite\" class=\"extiw\" title=\"en:Olmiite\">Olmiite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning II Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3067.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.4 x 4 x 3.4 cm.\u003C\u002Fdd>\n\u003Cdd>Distinctive cluster of four extremely well-formed radial clusters of the tan variety of olmiite on a nice contrasting matrix of massive Hausmannite. The olmiite balls, which range up to an amazing 2.4 cm, have a superb luster. Most of the radiating crystals have flat square lustrous terminations, which serve to create the surfaces of the balls.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",494,{"id":650,"source_url":651,"license_code":451,"credit_html":652,"title":653,"description":654,"author":455,"original_width":592,"original_height":655},72197,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10172043","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10172043\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Ettringite-Hausmannite-Oyelite-279138.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEttringite\" class=\"extiw\" title=\"en:Ettringite\">Ettringite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOyelite\" class=\"extiw\" title=\"en:Oyelite\">Oyelite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-55925.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 9 x 6 x 5 cm.\u003C\u002Fdd>\n\u003Cdd>This piece is perhaps the most starkly aesthetic and sculptural of the lot, with a single dramatic, lemon yellow crystal just flying up off the matrix, braced in its freefall by a little crossbar crystal. That crystal is the sharpest in the lot, as well....very equant, and very complete-all-around with no damage or dings. It is 4 cm long, 1.5 cm thick. The matrix is hausmannite and hematite, coated by a rich carpet of soft oyelite.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",828,{"id":657,"source_url":658,"license_code":451,"credit_html":659,"title":660,"description":661,"author":455,"original_width":662,"original_height":663},72205,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448400","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448400\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Ettringite-Hausmannite-Oyelite-Ettringite-Kalahari-Namibia-85mm 0623.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEttringite\" class=\"extiw\" title=\"en:Ettringite\">Ettringite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOyelite\" class=\"extiw\" title=\"en:Oyelite\">Oyelite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 9 x 6 x 5 cm\n\u003Cdl>\u003Cdt>Ettringite with Hausmannite and Oyelite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This piece is perhaps the most starkly aesthetic and sculptural of the lot, with a single dramatic, lemon yellow crystal just flying up off the matrix, braced in its freefall by a little crossbar crystal. That crystal is the sharpest in the lot, as well....VERY equant, and very complete all around with no damage or dings. It is 4 cm long, 1.5 cm thick. The matrix is hausmannite and hematite, coated by a rich carpet of soft oyelite. I have NEVER seen such an example, on contrasting matrix and so 3-dimensional, for sale.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",3465,2804,{"id":665,"source_url":666,"license_code":451,"credit_html":667,"title":668,"description":661,"author":455,"original_width":669,"original_height":670},72206,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448401","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448401\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Ettringite-Hausmannite-Oyelite-Ettringite-Kalahari-Namibia-85mm 0626.jpg",3221,2655,{"id":672,"source_url":673,"license_code":451,"credit_html":674,"title":675,"description":676,"author":455,"original_width":677,"original_height":678},72207,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448402","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10448402\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Ettringite-Hausmannite-Oyelite-Ettringite-Kalahari-Namibia-90mm 0611.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEttringite\" class=\"extiw\" title=\"en:Ettringite\">Ettringite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHausmannite\" class=\"extiw\" title=\"en:Hausmannite\">Hausmannite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOyelite\" class=\"extiw\" title=\"en:Oyelite\">Oyelite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet,\n\u003Cdl>\u003Cdt>Ettringite on Oyelite with Hausmannite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>3 major crystals dominate the top of this matrix plate of hausmannite, smothered by a soft carpet of oyelite. The two frontal crystals are 4 cm long, and a 5-cm crystal runs under them, linking them all together in a chain of color. A larger, fatter , broken-off crystal is a backstop at the base of the cluster. Overall this is a dramatic piece, particularly shown in the vertical, and it is more ettringite than one normally sees on one specimen!\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",2912,4196,[680,686,691,696],{"id":681,"url":682,"label":683,"formula":684,"spacegroup":685,"year":416},5926,"\u002Fcif\u002F5926.cif","Baron 1998 · Mn3 O4","Mn3 O4","I 41\u002Fa m d",{"id":687,"url":688,"label":689,"formula":690,"spacegroup":685,"year":416},5927,"\u002Fcif\u002F5927.cif","Baron 1998 · Mn2.938 Fe.062 O4","Mn2.938 Fe.062 O4",{"id":692,"url":693,"label":694,"formula":695,"spacegroup":685,"year":416},5928,"\u002Fcif\u002F5928.cif","Baron 1998 · (Mn2.703 Fe.297) O4","(Mn2.703 Fe.297) O4",{"id":697,"url":698,"label":699,"formula":684,"spacegroup":685,"year":357},5929,"\u002Fcif\u002F5929.cif","Aminoff 1926",[701,702,703,704,705,706,707,708,709,710,711,712,713,714,715],"Arseniodialytit","Arseniodialytita","Arseniodialytite","Black Manganese","Blättricher Schwarz-Braunstein","Gewässertes Manganperoxydul","Glanzbraunstein","L'oxyde rouge de manganèse","Manganèse oxydé hydraté","Manganèse oxydé noir brunâtre","Pyramidal Manganese Ore","Pyramidales Mangan-Erz","Scharfmanganerz","Schwarz-Manganerz","Schwarzer Braunstein",[717,721,725,729,733,737,741,745,749,752,756,759,762,766,770,774,778,781,784,787,790,793,797,801,805],{"lang":718,"names":719},"ar",[720],"هاوسمانيت",{"lang":722,"names":723},"be",[724],"Гаўсманіт",{"lang":726,"names":727},"bs",[728],"Hausmanit",{"lang":730,"names":731},"ca",[732],"hausmannita",{"lang":734,"names":735},"de",[736],"Hausmannit",{"lang":738,"names":739},"el",[740],"Χαουσμανίτης",{"lang":742,"names":743},"es",[744],"Hausmannita",{"lang":746,"names":747},"et",[748],"hausmanniit",{"lang":750,"names":751},"eu",[744],{"lang":753,"names":754},"fa",[755],"هوسمانیت",{"lang":757,"names":758},"fr",[7],{"lang":760,"names":761},"it",[7],{"lang":763,"names":764},"kk",[765],"Гаусманит",{"lang":767,"names":768},"lt",[769],"Hausmanitas",{"lang":771,"names":772},"nb",[773],"hausmannitt",{"lang":775,"names":776},"nl",[777],"Hausmanniet",{"lang":779,"names":780},"nn",[773],{"lang":782,"names":783},"pl",[728],{"lang":785,"names":786},"ru",[765],{"lang":788,"names":789},"sl",[728],{"lang":791,"names":792},"sv",[736],{"lang":794,"names":795},"tg",[796],"Ҳаусманит",{"lang":798,"names":799},"uk",[800],"Гаусманіт",{"lang":802,"names":803},"uz",[804],"Gausmanit",{"lang":806,"names":807},"zh",[808,809],"黑锰石","黑锰矿","Q383713",{"history":11,"applications":11}]