[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:1756":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":12,"weighting":13,"nolocadd":14,"blacklisted":14,"mindat_formula":15,"mindat_formula_note":11,"ima_formula":15,"elements":16,"sigelements":20,"key_elements":11,"impurities":11,"cim":21,"ima_status":22,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":25,"discovery_year":26,"strunz10ed1":27,"strunz10ed2":28,"strunz10ed3":29,"strunz10ed4":30,"dana8ed1":31,"dana8ed2":32,"dana8ed3":32,"dana8ed4":33,"csystem":34,"cclass":35,"spacegroup":36,"spacegroupset":37,"a":38,"b":39,"c":40,"alpha":37,"beta":37,"gamma":37,"aerror":11,"berror":11,"cerror":11,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":41,"csmetamict":14,"commentcrystal":42,"twinning":43,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":44,"tlform":11,"hmin":45,"hmax":41,"hardtype":11,"vhnmin":46,"vhnmax":47,"vhnerror":11,"vhng":48,"vhns":11,"commenthard":11,"dmeas":49,"dmeas2":49,"dcalc":50,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":51,"commentluster":11,"diapheny":52,"streak":53,"colour":54,"commentcolor":11,"colors":55,"streak_colors":59,"luminescence":11,"uv":60,"cleavage":61,"cleavagetype":62,"fracturetype":63,"tenacity":64,"commentbreak":11,"opticaltype":65,"opticalsign":66,"opticalalpha":67,"opticalalpha2":68,"opticalalphaerror":11,"opticalbeta":37,"opticalbeta2":37,"opticalbetaerror":11,"opticalgamma":67,"opticalgamma2":68,"opticalgammaerror":11,"opticalomega":37,"opticalomega2":37,"opticalomegaerror":11,"opticalepsilon":37,"opticalepsilon2":37,"opticalepsilonerror":11,"opticaln":37,"opticaln2":37,"opticalnerror":11,"optical2vcalc":37,"optical2vcalc2":37,"optical2vcalcerror":11,"optical2vmeasured":69,"optical2vmeasured2":70,"optical2vmeasurederror":11,"rimin":71,"rimax":72,"opticaldispersion":11,"opticalpleochroism":73,"opticalpleochorismdesc":74,"opticalbirefringence":75,"opticalcomments":76,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":77,"opticalr":78,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":79,"other":11,"industrial":80,"occurrence":81,"otheroccurrence":11,"type_specimen_store":82,"description_short":83,"aboutname":84,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":85,"reviewed_at":11,"variety_of":11,"varieties":86,"group_members":87,"associates":128,"confused_with":129,"type_localities":145,"occurrence_total":36,"citations":157,"images":229,"structures":411,"synonyms":425,"language_names":427,"wikidata_qid":468,"texts":469},1756,"1:1:1756:1","62ada685-1b6f-4651-8369-a767bab2e044","Groutite","Gro",0,"mineral",null,39566,1736,false,"Mn\u003Csup>3+\u003C\u002Fsup>O(OH)",[17,18,19],"Mn","O","H",[17,18,19],"7.18.8",[23,24],"APPROVED","GRANDFATHERED",1947,"1945","4","F","D","10","6","1","3","Orthorhombic",8,71,"0","4.560","10.700","2.870",4,"Non-standard space-group setting Pbnm.","Reported. [Compare twinning in isostructural diaspore.]","Wedge- or lens-shaped crystals. Type material showed: {110}, {120}, {130}, {010}, {100}, {111}, {021}, {134}",3.5,"630","711",100,"4.144","4.172","Sub-Adamantine,Resinous,Waxy,Greasy,Dull","Opaque","dark brown","Black, may be iridescent",[56,57,58],"black","brown","yellow",[57],"Not fluorescent in ultraviolet","Perfect on {010}\r\nLess perfect {100}","Perfect","Irregular\u002FUneven,Splintery","brittle","Biaxial","+","2.1","2.2","40","50",2.1,2.2,"Strong","X = very dark brown to black; Y = yellowish brown.","0.100","Strong pleochroism distinguishes groutite from manganite.","Parallel","(13.7 ,22.0) 400, \r\n(13.4 ,21.3) 420,\r\n(13.3 ,20.7) 440,\r\n(13.1, 20.2) 460,\r\n(13.0, 19.7) 480,\r\n(13.0, 19.4) 500,\r\n(12.9, 19.1) 520,\r\n(12.9, 19.0) 540,\r\n(12.8, 19.0) 560,\r\n(12.7, 18.7) 580,\r\n(12.7, 18.6) 600,\r\n(12.7, 18.5) 620,\r\n(12.6, 18.3) 640,\r\n(12.5, 18.2) 660,\r\n(12.4, 18.0) 680,\r\n(12.4, 17.9) 700","Groutite is infusible and loses water on heating in air at temperatures above 200°C. Heating at 150°C in air for five days does not affect it.","Manganese ore","Late stage mineralization in vugs in Banded Iron Formation (BIF)","The Natural History Museum, London, England, number 1948,106.\r\nNational Museum of Natural History, Washington, D.C., USA, number 105004.","Diaspore Group.\r\n\r\nFinal product of laser-induced degradation of \"groutellite\" (a variety of ramsdellite), with hausmannite as a possible intermediate.","Named in 1945 by John W. Gruner in honor of Frank Fitch Grout (August 1, January 24, 1880 Rockford, Illinois - August 1, 1958 Minneapolis, MN), petrologist, University of Minnesota, USA.","2025-08-11 12:14:20",[],[88,96,104,113,121],{"id":89,"name":90,"entrytype":9,"csystem":34,"ima_formula":91,"mindat_formula":91,"hmin":92,"hmax":93,"dmeas":94,"dcalc":95,"primary_image_id":11},748,"Bracewellite","CrO(OH)",5.5,6.5,"4.45","4.28",{"id":97,"name":98,"entrytype":9,"csystem":34,"ima_formula":99,"mindat_formula":99,"hmin":93,"hmax":100,"dmeas":101,"dcalc":102,"primary_image_id":103},1285,"Diaspore","AlO(OH)",7,"3.2","3.38",7183,{"id":105,"name":106,"entrytype":9,"csystem":34,"ima_formula":107,"mindat_formula":108,"hmin":109,"hmax":92,"dmeas":110,"dcalc":111,"primary_image_id":112},1719,"Goethite","FeO(OH)","Fe\u003Csup>3+\u003C\u002Fsup>O(OH)",5,"4.27","4.18",29787,{"id":114,"name":115,"entrytype":9,"csystem":34,"ima_formula":116,"mindat_formula":117,"hmin":92,"hmax":93,"dmeas":118,"dcalc":119,"primary_image_id":120},2769,"Montroseite","(V\u003Csup>3+\u003C\u002Fsup>,Fe\u003Csup>2+\u003C\u002Fsup>,V\u003Csup>4+\u003C\u002Fsup>)O(OH)","(V\u003Csup>3+\u003C\u002Fsup>,Fe\u003Csup>3+\u003C\u002Fsup>)O(OH)","4.0","4.11",16684,{"id":122,"name":123,"entrytype":9,"csystem":34,"ima_formula":124,"mindat_formula":124,"hmin":125,"hmax":126,"dmeas":37,"dcalc":127,"primary_image_id":11},11481,"Tsumgallite","GaO(OH)",1,2,"5.08",[],[130,131,132,138],{"id":89,"name":90,"entrytype":9,"csystem":34,"ima_formula":91,"mindat_formula":91,"hmin":92,"hmax":93,"dmeas":94,"dcalc":95,"primary_image_id":11},{"id":97,"name":98,"entrytype":9,"csystem":34,"ima_formula":99,"mindat_formula":99,"hmin":93,"hmax":100,"dmeas":101,"dcalc":102,"primary_image_id":103},{"id":133,"name":134,"entrytype":9,"csystem":135,"ima_formula":15,"mindat_formula":15,"hmin":11,"hmax":11,"dmeas":11,"dcalc":136,"primary_image_id":137},1473,"Feitknechtite","Trigonal","3.249",8418,{"id":139,"name":140,"entrytype":9,"csystem":141,"ima_formula":15,"mindat_formula":15,"hmin":41,"hmax":41,"dmeas":142,"dcalc":143,"primary_image_id":144},2519,"Manganite","Monoclinic","4.29","4.38",15298,[146,152],{"id":147,"txt":148,"latitude":149,"longitude":150,"country":151},25973,"Sagamore Mangan No. 2 pit, Riverton, Cuyuna North Range, Crow Wing County, Minnesota, USA",46.4536111,-94.0505556,"USA",{"id":153,"txt":154,"latitude":155,"longitude":156,"country":151},25974,"Mahnomen pit, Ironton, Cuyuna North Range, Crow Wing County, Minnesota, USA",46.475162,-94.0160577,[158,161,165,170,174,177,180,184,189,194,198,202,206,210,215,220,224],{"id":159,"year":25,"html":160,"doi":11},521731,"Gruner, John W. (1947) Groutite, HMnO2, a new mineral of the diaspore-goethite group. \u003Ci>American Mineralogist\u003C\u002Fi>,  32 (11-12) 654-659 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM32\u002FAM32_654.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":162,"year":163,"html":164,"doi":11},521793,1948,"Fleischer, M. (1948) New mineral names. \u003Ci>American Mineralogist\u003C\u002Fi>,  33 (5-6). 384-386 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM33\u002FAM33_384.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":166,"year":167,"html":168,"doi":169},462150,1949,"Collin, R. L., Lipscomb, W. N. (1949) The crystal structure of groutite, HMnO2. \u003Ci>Acta Crystallographica\u003C\u002Fi>,  2 (2) 104-106 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0365110x49000230'>doi:10.1107\u002Fs0365110x49000230\u003C\u002Fa>","10.1107\u002Fs0365110x49000230",{"id":171,"year":172,"html":173,"doi":11},523244,1959,"Klingsberg, C., Roy, R. (1959) Stability and interconvertibility of phases in the system Mn-O-OH. \u003Ci>American Mineralogist\u003C\u002Fi>,  44 (7-8) 819-838 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM44\u002FAM44_819.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":175,"year":172,"html":176,"doi":11},523248,"Segeler, Curt G. (1959) Notes on a second occurrence of groutite. \u003Ci>American Mineralogist\u003C\u002Fi>,  44 (7-8) 877-878 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM44\u002FAM44_877.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":178,"year":172,"html":179,"doi":11},16110936,"Hariya, Yu (1959) New Find of Groutite, HMnO2, in Japan. \u003Ci>Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy\u003C\u002Fi>,  10 (2). 255-262 \u003Ca target='_blank' href='https:\u002F\u002Feprints.lib.hokudai.ac.jp\u002Fdspace\u002Fbitstream\u002F2115\u002F35910\u002F1\u002F10%282%29_255-262.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":181,"year":182,"html":183,"doi":11},523647,1962,"Fleischer, Michael, Richmond, W. E., Evans, Howard T. (1962) Studies of the manganese oxides. V. Ramsdellite, MnO2, an orthorhombic dimorph of pyrolusite. \u003Ci>American Mineralogist\u003C\u002Fi>,  47 (1-2) 47-58 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM47\u002FAM47_47.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":185,"year":186,"html":187,"doi":188},5819,1964,"Lima-De-Faria, J., Lopes-Vieira, A. (1964) The transformation of groutite (α-MnOOH) into pyrolusite (MnO2) \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  33 (266) 1024-1031 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1964.033.266.10'>doi:10.1180\u002Fminmag.1964.033.266.10\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_33\u002F33-266-1024.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1964.033.266.10",{"id":190,"year":191,"html":192,"doi":193},5875,1965,"Dent Glasser, L. S., Smith, Ian B. (1965) Topotaxy in the system MnO-O-H2O: groutite–ramsdellite–pyrolusite. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  35 (270) 327-334 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1965.035.270.06'>doi:10.1180\u002Fminmag.1965.035.270.06\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_35\u002F35-270-327.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1965.035.270.06",{"id":195,"year":196,"html":197,"doi":11},524709,1967,"Klein, Cornelius, Frondel, Clifford (1967) Antimonian groutite. \u003Ci>American Mineralogist\u003C\u002Fi>,  52 (5-6). 858-860 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM52\u002FAM52_858.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":199,"year":200,"html":201,"doi":11},524996,1968,"Klein, Cornelis (1968) Antimonian groutite: a correction. \u003Ci>American Mineralogist\u003C\u002Fi>,  53 (7-8) 1417 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM53\u002FAM53_1417.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":203,"year":200,"html":204,"doi":205},218680,"Dent Glasser, L. S., Ingram, L. (1968) Refinement of the crystal structure of groutite – MnOOH. \u003Ci>Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry\u003C\u002Fi>,  24 (9) 1233-1236 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0567740868004036'>doi:10.1107\u002Fs0567740868004036\u003C\u002Fa>","10.1107\u002Fs0567740868004036",{"id":207,"year":208,"html":209,"doi":11},16110942,1969,"Majmundar, H. H. (1969) Ramsdellite and groutite from Nova Scotia. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  9 (5) 718-720 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM9_718.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":211,"year":212,"html":213,"doi":214},583499,1997,"Kohler, Thomas, Armbruster, Thomas, Libowitzky, Eugen (1997) Hydrogen Bonding and Jahn–Teller Distortion in Groutite,α-MnOOH, and Manganite,γ-MnOOH, and Their Relations to the Manganese Dioxides Ramsdellite and Pyrolusite. \u003Ci>Journal of Solid State Chemistry\u003C\u002Fi>,  133. 486-500 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1006\u002Fjssc.1997.7516'>doi:10.1006\u002Fjssc.1997.7516\u003C\u002Fa>","10.1006\u002Fjssc.1997.7516",{"id":216,"year":217,"html":218,"doi":219},395069,2004,"Post, Jeffrey E., Heaney, Peter J. (2004) Neutron and synchrotron X-ray diffraction study of the structures and dehydration behaviors of ramsdellite and “groutellite”. \u003Ci>American Mineralogist\u003C\u002Fi>,  89 (7) 969-975 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-2004-0706'>doi:10.2138\u002Fam-2004-0706\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fam\u002Fvol89\u002FAM89_969.pdf' class='refpdflink'>\u003C\u002Fa>","10.2138\u002Fam-2004-0706",{"id":221,"year":222,"html":223,"doi":11},16964677,2005,"(2005) Groutite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fgroutite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":225,"year":226,"html":227,"doi":228},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",[230,240,248,255,263,271,278,285,293,301,309,318,326,332,339,346,352,359,366,374,381,386,393,399,405],{"id":231,"source_url":232,"license_code":233,"credit_html":234,"title":235,"description":236,"author":237,"original_width":238,"original_height":239},10513,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10131391","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10131391\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-41824.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Robert Mine (Roberts Mine; Kennedy Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCuyuna_Range\" class=\"extiw\" title=\"en:Cuyuna Range\">Cuyuna Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCrow_Wing_County,_Minnesota\" class=\"extiw\" title=\"en:Crow Wing County, Minnesota\">Crow Wing County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinnesota\" class=\"extiw\" title=\"en:Minnesota\">Minnesota\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-19745.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>A \"worm\" of small groutite crystals in ballshaped aggregates, crawling over the matrix, makes this very unsuual. A note from the collector who found them around 1984 noted he found only 2 such specimens among hundreds total recovered! 7.2 x 5.7 x 3.8 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",600,447,{"id":241,"source_url":242,"license_code":233,"credit_html":243,"title":244,"description":245,"author":237,"original_width":246,"original_height":247},10514,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10138700","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10138700\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-114269.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Robert Mine (Roberts Mine; Kennedy Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCuyuna_Range\" class=\"extiw\" title=\"en:Cuyuna Range\">Cuyuna Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCrow_Wing_County,_Minnesota\" class=\"extiw\" title=\"en:Crow Wing County, Minnesota\">Crow Wing County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinnesota\" class=\"extiw\" title=\"en:Minnesota\">Minnesota\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-19745.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.1 x 4.3 x 4.0 cm.\u003C\u002Fdd>\n\u003Cdd>Super-lustrous, jet-black groutite crystals richly line two larger vugs and smaller vugs in a very interesting quartz and massive manganese matrix from a mine near the Minnesota type locality. The box work quartz \"cap\" on the top of the piece is striking. This is a very fine specimen of the species from a famous lucky strike in the 1980s.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",549,446,{"id":249,"source_url":250,"license_code":233,"credit_html":251,"title":252,"description":245,"author":237,"original_width":253,"original_height":254},57550,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10138703","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10138703\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-114272.jpg",504,407,{"id":256,"source_url":257,"license_code":233,"credit_html":258,"title":259,"description":260,"author":237,"original_width":261,"original_height":262},10515,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10141791","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10141791\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-132454.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Robert Mine (Roberts Mine; Kennedy Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCuyuna_Range\" class=\"extiw\" title=\"en:Cuyuna Range\">Cuyuna Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCrow_Wing_County,_Minnesota\" class=\"extiw\" title=\"en:Crow Wing County, Minnesota\">Crow Wing County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinnesota\" class=\"extiw\" title=\"en:Minnesota\">Minnesota\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-19745.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 7.5 x 6.7 x 4.2 cm.\u003C\u002Fdd>\n\u003Cdd>Super-lustrous, jet-black groutite crystals richly line a vug in a very interesting quartz and massive manganese matrix from a mine near the Minnesota type locality. This is a very fine specimen of the species from a famous lucky strike in the 1980s. Rare on the market!\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",572,616,{"id":264,"source_url":265,"license_code":233,"credit_html":266,"title":267,"description":268,"author":237,"original_width":269,"original_height":270},57551,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10141133","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10141133\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-122969.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Black Water Mine, Black Mesa Basin, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FApache_County,_Arizona\" class=\"extiw\" title=\"en:Apache County, Arizona\">Apache County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArizona\" class=\"extiw\" title=\"en:Arizona\">Arizona\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-44341.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 12.3 x 3.6 x 2.9 cm.\u003C\u002Fdd>\n\u003Cdd>Superb, lustrous needles of groutite, to 4 mm, RICHLY cover both sides of CABINET-SIZED quartz-replaced petrified wood! This specimen is from a remarkable and so far unique find in 1975. A miner who’d worked in the area for years brought in a small lot of a dozen specimens to a rock shop owned by Lolette Dalbeck in Ridgecrest, California. This would be one of the larger specimens. It is REALLY bizarre material for the species! Ex. Stephen Chamberlain Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",650,255,{"id":272,"source_url":273,"license_code":233,"credit_html":274,"title":275,"description":276,"author":237,"original_width":277,"original_height":238},10516,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10142451","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10142451\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-137990.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Robert Mine (Roberts Mine; Kennedy Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCuyuna_Range\" class=\"extiw\" title=\"en:Cuyuna Range\">Cuyuna Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCrow_Wing_County,_Minnesota\" class=\"extiw\" title=\"en:Crow Wing County, Minnesota\">Crow Wing County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinnesota\" class=\"extiw\" title=\"en:Minnesota\">Minnesota\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-19745.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.0 x 4.0 x 3.5 cm.\u003C\u002Fdd>\n\u003Cdd>Two connected clusters of super-lustrous and sharp, jet-black groutite crystals richly cover a sculptural arrowhead-like matrix of hematite with a bit of quartz from a mine near the Minnesota type locality. This is a very fine specimen of the species from a famous lucky strike in the 1980s. Rare on the market! The rosette is very showy.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",403,{"id":279,"source_url":280,"license_code":233,"credit_html":281,"title":282,"description":268,"author":237,"original_width":283,"original_height":284},57552,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10141134","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10141134\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-122970.jpg",550,388,{"id":286,"source_url":287,"license_code":233,"credit_html":288,"title":289,"description":290,"author":237,"original_width":291,"original_height":292},10517,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161304","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161304\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-215145.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Emilie Mine (Bülten-Adenstedt Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPeine\" class=\"extiw\" title=\"en:Peine\">Peine\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FLower_Saxony\" class=\"extiw\" title=\"en:Lower Saxony\">Lower Saxony\u003C\u002Fa>, Germany (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7065.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 11.1 x 5.6 x 5.4 cm.\u003C\u002Fdd>\n\u003Cdd>This is an outstanding specimen of crystallized groutite in huge crystals and in a rich quantity, as well. The cluster of crystals measures 3.5 x 3 cm and fills half of a hollow vug inside this manganese nodule (part remains packed with hardened kaolin clay). The overall specimen is important for the species, but also interesting for the environment, and how it shows the crystals formed inside a hollowed nodule of the manganese. Groutite seldom forms such large crystals, nor such rich masses.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",315,400,{"id":294,"source_url":295,"license_code":233,"credit_html":296,"title":297,"description":298,"author":237,"original_width":299,"original_height":300},10518,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441329","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441329\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-md43a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Robert Mine (Roberts Mine; Kennedy Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCuyuna_Range\" class=\"extiw\" title=\"en:Cuyuna Range\">Cuyuna Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCrow_Wing_County,_Minnesota\" class=\"extiw\" title=\"en:Crow Wing County, Minnesota\">Crow Wing County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinnesota\" class=\"extiw\" title=\"en:Minnesota\">Minnesota\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-19745.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 2.2 x 1.8 x 1.3 cm\n\u003Cdl>\u003Cdt>Groutite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>The jet-black crystals are razor-sharp, and they have a mirror-like luster to them that is reminiscent of the finest black Andradite garnets. This is a very fine thumbnail that is actually better in person. Comparing these crystals to others you have seen will show just how outstanding they really are. This small, defunct locality produced in the past one pocket which , for crystal size and disctinction of habit, are surely the worlds best of species. 2.2 x 1.8 x 1.3 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",503,800,{"id":302,"source_url":303,"license_code":233,"credit_html":304,"title":305,"description":306,"author":237,"original_width":307,"original_height":308},10519,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10477356","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10477356\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-tuc1048b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Emilie Mine (Bülten-Adenstedt Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPeine\" class=\"extiw\" title=\"en:Peine\">Peine\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FLower_Saxony\" class=\"extiw\" title=\"en:Lower Saxony\">Lower Saxony\u003C\u002Fa>, Germany (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7065.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 9.5 x 4.8 x 4.2 cm\n\u003Cdl>\u003Cdt>Groutite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This is an OUTSTANDING specimen of crystallized groutite in huge crystals and in a rich quantity, as well. The clusters of crystals measure to 1 cm and are richly scattered about a hollow vug inside this manganese nodule. The overall specimen is important for the species, but also interesting for how it shows the crystals formed, inside a hollowed nodule of the elemental manganese. It displays nicely from either angle, vertical or horizontal. When I first saw this specimen I was sure it was perhaps manganite or some other species, as groutite seldom forms such large crystals , nor such rich masses from other locations! But then I remembered I had one such before, as well. They are rare, and seldom seen. Also, the lustre on these crystals is quite good. From an old German collection recently starting to be sold...\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",1800,1366,{"id":310,"source_url":311,"license_code":233,"credit_html":312,"title":313,"description":314,"author":315,"original_width":316,"original_height":317},10520,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=14865664","Christian Rewitzer, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=14865664\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-114104.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Black Water Mine, Black Mesa Basin, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FApache_County,_Arizona\" class=\"extiw\" title=\"en:Apache County, Arizona\">Apache County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArizona\" class=\"extiw\" title=\"en:Arizona\">Arizona\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-44341.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Picture width 6 mm. Collection and photograph Christian Rewitzer  This Photo was Mindat.org Photo of the Day - 5th Nov 2007\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Christian Rewitzer",1000,789,{"id":319,"source_url":320,"license_code":233,"credit_html":321,"title":322,"description":323,"author":237,"original_width":324,"original_height":325},57554,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174729","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174729\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-291298.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Emilie Mine (Bülten-Adenstedt Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPeine\" class=\"extiw\" title=\"en:Peine\">Peine\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FLower_Saxony\" class=\"extiw\" title=\"en:Lower Saxony\">Lower Saxony\u003C\u002Fa>, Germany (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7065.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 9.5 x 4.8 x 4.2 cm.\u003C\u002Fdd>\n\u003Cdd>This is an outstanding specimen of crystallized groutite in huge crystals and in a rich quantity, as well. The clusters of crystals measure to 1 cm and are richly scattered about a hollow vug inside this manganese oxide nodule. The overall specimen is important for the species, but also interesting for how it shows the crystals formed, inside a hollowed nodule of the manganese oxides. When I first saw this specimen I was sure it was perhaps manganite or some other species, as groutite seldom forms such large crystals, nor such rich masses from other locations. But then I remembered I had one such before, as well. They are rare, and seldom seen. Also, the lustre on these crystals is quite good. From an old German collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",1012,768,{"id":327,"source_url":328,"license_code":233,"credit_html":329,"title":330,"description":323,"author":237,"original_width":331,"original_height":325},57555,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174732","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174732\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-291299.jpg",940,{"id":333,"source_url":334,"license_code":233,"credit_html":335,"title":336,"description":337,"author":237,"original_width":238,"original_height":338},57564,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10429510","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10429510\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-d05-128a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Robert Mine (Roberts Mine; Kennedy Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCuyuna_Range\" class=\"extiw\" title=\"en:Cuyuna Range\">Cuyuna Range\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCrow_Wing_County,_Minnesota\" class=\"extiw\" title=\"en:Crow Wing County, Minnesota\">Crow Wing County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMinnesota\" class=\"extiw\" title=\"en:Minnesota\">Minnesota\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-19745.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 7.2 x 4.8 x 5.2 cm\n\u003Cdl>\u003Cdt>Groutite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>SUPERB CRYSTALS for the species from a remote but important locality for the reason that it produces such good groutites! These lustrous, bladed crystals reach to 4mm in size. The jet-black crystals are razor-sharp, and they have a mirror-like luster to them that is reminiscent of the finest black Andradite garnets. This is a very fine thumbnail that is actually better in person. Comparing these crystals to others you have seen of the species will show just how outstanding they really are. This small, defunct locality produced in the past one pocket which , for crystal size and distinction of habit, are surely the worlds best of species.  7.2 x 4.8 x 5.2 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",527,{"id":340,"source_url":341,"license_code":233,"credit_html":342,"title":343,"description":344,"author":237,"original_width":345,"original_height":300},57565,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10461430","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10461430\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-rare-09-33b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Emilie Mine (Bülten-Adenstedt Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPeine\" class=\"extiw\" title=\"en:Peine\">Peine\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FLower_Saxony\" class=\"extiw\" title=\"en:Lower Saxony\">Lower Saxony\u003C\u002Fa>, Germany (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7065.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: cabinet, 11.1 x 5.6 x 5.4 cm\n\u003Cdl>\u003Cdt>Groutite in manganese nodule\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This is an OUTSTANDING specimen of crystallized groutite in huge crystals and in a rich quantity, as well. The cluster of crystals measures 3.5 x 3 cm and fills half of a hollow vug inside this manganese nodule (part remains packed with hardened kaolin clay). The overall specimen is important for the species, but also interesting for the environment, and how it shows the crystals formed inside a hollowed nodule of the manganese. It displays nicely (or upside down, as a rounded lump with a surprise inside). When I first saw this specimen I was sure it was perhaps manganite or some other species, as groutite seldom forms such large crystals , nor such rich masses.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",412,{"id":347,"source_url":348,"license_code":233,"credit_html":349,"title":350,"description":306,"author":237,"original_width":307,"original_height":351},57567,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10477353","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10477353\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-tuc1048c.jpg",1471,{"id":353,"source_url":354,"license_code":233,"credit_html":355,"title":356,"description":357,"author":237,"original_width":358,"original_height":292},57553,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10165987","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10165987\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Vesuvianite-Groutite-243488.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FVesuvianite\" class=\"extiw\" title=\"en:Vesuvianite\">Vesuvianite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Jeffrey mine (Jeffrey quarry; Johns-Manville mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAsbestos\" class=\"extiw\" title=\"en:Asbestos\">Asbestos\u003C\u002Fa>, Les Sources RCM, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEstrie\" class=\"extiw\" title=\"en:Estrie\">Estrie\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuebec\" class=\"extiw\" title=\"en:Quebec\">Québec\u003C\u002Fa>, Canada (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-581.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 6.1 x 3.5 x 3.4 cm.\u003C\u002Fdd>\n\u003Cdd>This large and undamaged matrix specimen is covered with gemmy, lustrous, apple green crystals of vesuvianite, to 2.0 cm in length. There are also elongated 2mm crystals of an opaque, dark green, mineral scattered on several vesuvianite crystals, which have been analyzed as acicular groutite, a manganese oxide. This is a very good, relatively large specimen anyways, but the groutite adds a neat touch.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",361,{"id":360,"source_url":361,"license_code":233,"credit_html":362,"title":363,"description":364,"author":237,"original_width":238,"original_height":365},57556,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10176953","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10176953\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-Chalcedony-226380.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FChalcedony\" class=\"extiw\" title=\"en:Chalcedony\">Chalcedony\u003C\u002Fa> (Var.: Petrified Wood)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Black Water Mine, Black Mesa Basin, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FApache_County,_Arizona\" class=\"extiw\" title=\"en:Apache County, Arizona\">Apache County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArizona\" class=\"extiw\" title=\"en:Arizona\">Arizona\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-44341.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 3.9 x 3.2 x 0.8 cm.\u003C\u002Fdd>\n\u003Cdd>Groutite is a rare manganese oxide. Lustrous needles of groutite, to 4 mm, are richly scattered on both sides of the ribbed, quartz-replaced petrified wood. This specimen is from a remarkable and so far unique find in 1975. A miner who’d worked in the area for years brought in a small lot of specimens to a rock shop owned by Lolette Dalbeck in Ridgecrest, California. Ex. Mullane Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",493,{"id":367,"source_url":368,"license_code":233,"credit_html":369,"title":370,"description":371,"author":237,"original_width":372,"original_height":373},57557,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177009","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177009\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-Chalcedony-230569.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FChalcedony\" class=\"extiw\" title=\"en:Chalcedony\">Chalcedony\u003C\u002Fa> (Var.: Petrified Wood)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Black Water Mine, Black Mesa Basin, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FApache_County,_Arizona\" class=\"extiw\" title=\"en:Apache County, Arizona\">Apache County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArizona\" class=\"extiw\" title=\"en:Arizona\">Arizona\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-44341.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 2.9 x 2.3 x 1.1 cm.\u003C\u002Fdd>\n\u003Cdd>Groutite is a rare manganese oxide. Lustrous needles of groutite, to 5 mm, are scatttered on both sides and the top of the ribbed, quartz-replaced petrified wood. This specimen is from a remarkable and so far unique find in 1975. A miner who’d worked in the area for years brought in a small lot of specimens to a rock shop owned by Lolette Dalbeck in Ridgecrest, California. Ex. Mullane Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",750,554,{"id":375,"source_url":376,"license_code":233,"credit_html":377,"title":378,"description":379,"author":237,"original_width":292,"original_height":380},57558,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419081","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419081\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-Vesuvianite-tmix07-152c.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FVesuvianite\" class=\"extiw\" title=\"en:Vesuvianite\">Vesuvianite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Jeffrey mine (Jeffrey quarry; Johns-Manville mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAsbestos\" class=\"extiw\" title=\"en:Asbestos\">Asbestos\u003C\u002Fa>, Les Sources RCM, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEstrie\" class=\"extiw\" title=\"en:Estrie\">Estrie\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuebec\" class=\"extiw\" title=\"en:Quebec\">Québec\u003C\u002Fa>, Canada (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-581.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 8.0 x 5.6 x 2.6 cm\n\u003Cdl>\u003Cdt>Vesuvianite and Groutite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>On a matrix of massive vesuvianite are hundreds of gemmy, lustrous, apple green crystals, including one large crystal 3.0 cm across that is dramatically doubly-terminated. This piece has excellent lustre and classic apple-green color. The dark acicular crystals, to 2.0 mm long, are groutite.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",296,{"id":382,"source_url":383,"license_code":233,"credit_html":384,"title":385,"description":379,"author":237,"original_width":291,"original_height":292},57559,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419083","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419083\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-Vesuvianite-tmix07-152b.jpg",{"id":387,"source_url":388,"license_code":233,"credit_html":389,"title":390,"description":391,"author":237,"original_width":300,"original_height":392},57560,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419122","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419122\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-Vesuvianite-tmix07-146a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FVesuvianite\" class=\"extiw\" title=\"en:Vesuvianite\">Vesuvianite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Jeffrey mine (Jeffrey quarry; Johns-Manville mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAsbestos\" class=\"extiw\" title=\"en:Asbestos\">Asbestos\u003C\u002Fa>, Les Sources RCM, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEstrie\" class=\"extiw\" title=\"en:Estrie\">Estrie\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuebec\" class=\"extiw\" title=\"en:Quebec\">Québec\u003C\u002Fa>, Canada (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-581.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 6.2 x 4.0 x 2.3 cm\n\u003Cdl>\u003Cdt>Vesuvianite with Groutite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This is a cluster of gemmy, apple-green crystals of vesuvianite, to 1.5 cm in length, with exemplary lustre like glass. The cluster is an extravagant forest of them, sticking out all over. Many are translucent, more so than usual. The piece also hosts a few acicular crystals of groutite, to 1.5 mm in length.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",518,{"id":394,"source_url":395,"license_code":233,"credit_html":396,"title":397,"description":391,"author":237,"original_width":398,"original_height":292},57561,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419123","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419123\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-Vesuvianite-tmix07-146c.jpg",283,{"id":400,"source_url":401,"license_code":233,"credit_html":402,"title":403,"description":404,"author":237,"original_width":358,"original_height":292},57562,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419125","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419125\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-Vesuvianite-tmix07-143b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGroutite\" class=\"extiw\" title=\"en:Groutite\">Groutite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FVesuvianite\" class=\"extiw\" title=\"en:Vesuvianite\">Vesuvianite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Jeffrey mine (Jeffrey quarry; Johns-Manville mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAsbestos\" class=\"extiw\" title=\"en:Asbestos\">Asbestos\u003C\u002Fa>, Les Sources RCM, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEstrie\" class=\"extiw\" title=\"en:Estrie\">Estrie\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuebec\" class=\"extiw\" title=\"en:Quebec\">Québec\u003C\u002Fa>, Canada (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-581.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 6.1 x 3.5 x 3.4 cm\n\u003Cdl>\u003Cdt>Vesuvianite with Groutite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This large and undamaged matrix specimen is covered with gemmy, lustrous, apple green crystals of vesuvianite, to 2.0 cm in length. There are also elongated 2mm crystals of an opaque, dark green, mineral scattered on several vesuvianite crystals, which have been analyzed as acicular groutite, a manganese oxide. This is a very good, relatively large specimen anyways, but the groutite adds a neat touch.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":406,"source_url":407,"license_code":233,"credit_html":408,"title":409,"description":404,"author":237,"original_width":410,"original_height":292},57563,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419127","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10419127\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Groutite-Vesuvianite-tmix07-143c.jpg",322,[412,418],{"id":413,"url":414,"label":415,"formula":416,"spacegroup":417,"year":212},5789,"\u002Fcif\u002F5789.cif","Kohler 1997","Mn O2 H","P n m a",{"id":419,"url":420,"label":421,"formula":422,"spacegroup":423,"year":424},5790,"\u002Fcif\u002F5790.cif","Wyckoff 1963","Mn (O2 H)","P b n m",1963,[426],"Groutiet",[428,432,436,440,443,446,449,453,456,460,464],{"lang":429,"names":430},"ca",[431],"groutita",{"lang":433,"names":434},"de",[435],"Groutit",{"lang":437,"names":438},"es",[439],"Groutita",{"lang":441,"names":442},"eu",[439],{"lang":444,"names":445},"fr",[7],{"lang":447,"names":448},"it",[7],{"lang":450,"names":451},"nb",[452],"groutitt",{"lang":454,"names":455},"nn",[452],{"lang":457,"names":458},"pl",[459],"Groutyt",{"lang":461,"names":462},"uk",[463],"Граутит",{"lang":465,"names":466},"zh",[467],"斜方水锰矿","Q304018",{"history":11,"applications":11}]