[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:6894":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":11,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":14,"mindat_formula_note":11,"ima_formula":15,"elements":16,"sigelements":22,"key_elements":23,"impurities":11,"cim":11,"ima_status":24,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":11,"discovery_year":27,"strunz10ed1":28,"strunz10ed2":29,"strunz10ed3":30,"strunz10ed4":31,"dana8ed1":32,"dana8ed2":33,"dana8ed3":34,"dana8ed4":35,"csystem":36,"cclass":37,"spacegroup":38,"spacegroupset":39,"a":40,"b":39,"c":41,"alpha":39,"beta":39,"gamma":39,"aerror":42,"berror":11,"cerror":43,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":42,"csmetamict":13,"commentcrystal":11,"twinning":11,"tranglide":11,"parting":11,"epitaxidescription":44,"morphology":45,"tlform":11,"hmin":46,"hmax":46,"hardtype":11,"vhnmin":39,"vhnmax":39,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":47,"dmeas2":47,"dcalc":48,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":49,"lustretype":50,"commentluster":11,"diapheny":51,"streak":52,"colour":53,"commentcolor":11,"colors":54,"streak_colors":57,"luminescence":11,"uv":11,"cleavage":58,"cleavagetype":59,"fracturetype":11,"tenacity":11,"commentbreak":11,"opticaltype":60,"opticalsign":61,"opticalalpha":39,"opticalalpha2":39,"opticalalphaerror":11,"opticalbeta":39,"opticalbeta2":39,"opticalbetaerror":11,"opticalgamma":39,"opticalgamma2":39,"opticalgammaerror":11,"opticalomega":62,"opticalomega2":63,"opticalomegaerror":11,"opticalepsilon":64,"opticalepsilon2":65,"opticalepsilonerror":11,"opticaln":39,"opticaln2":39,"opticalnerror":11,"optical2vcalc":39,"optical2vcalc2":39,"optical2vcalcerror":11,"optical2vmeasured":39,"optical2vmeasured2":39,"optical2vmeasurederror":11,"rimin":66,"rimax":67,"opticaldispersion":11,"opticalpleochroism":68,"opticalpleochorismdesc":69,"opticalbirefringence":11,"opticalcomments":11,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":11,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":70,"industrial":11,"occurrence":11,"otheroccurrence":71,"type_specimen_store":72,"description_short":73,"aboutname":74,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":75,"reviewed_at":11,"variety_of":11,"varieties":76,"group_members":77,"associates":78,"confused_with":79,"type_localities":80,"occurrence_total":87,"citations":88,"images":156,"structures":309,"synonyms":316,"language_names":322,"wikidata_qid":350,"texts":351},6894,"1:1:6894:5","011fb504-a812-4e9b-82d9-e2ed2c685ed7","Cumengeite","Cge",0,"mineral",null,2393,false,"Pb\u003Csub>21\u003C\u002Fsub>Cu\u003Csub>20\u003C\u002Fsub>Cl\u003Csub>42\u003C\u002Fsub>(OH)\u003Csub>40\u003C\u002Fsub>·6H\u003Csub>2\u003C\u002Fsub>O","Pb\u003Csub>21\u003C\u002Fsub>Cu\u003Csub>20\u003C\u002Fsub>Cl\u003Csub>42\u003C\u002Fsub>(OH)\u003Csub>40\u003C\u002Fsub> · 6H\u003Csub>2\u003C\u002Fsub>O",[17,18,19,20,21],"Cl","Cu","Pb","O","H",[17,18,19,20,21],[17,18,19],[25,26],"APPROVED","GRANDFATHERED","1893","3","D","B","20","10","6","7","1","Tetragonal",27,176,"0","15.065","24.436",2,5,"Parallel overgrowths of cumengite on crystals of boleite and pseudoboleite.","Octahedral or cubo-octahedral crystals. Commonly on the faces of boleite or pseudoboleite.",2.5,"4.656","4.66","Adamantine","Sub-Vitreous","Translucent","Sky-blue","Indigo blue",[55,56],"blue","green",[55],"{101} good; {110} distinct; {001} Poor.","Distinct\u002FGood","Uniaxial","-","2.026","2.041","1.926","1.965",1.926,2.041,"Visible","Dichroic.\r\nO = darker blue with green tint\r\nE = Pure blue","Soluble in HNO3.","Secondary zone of lead deposits. Smelter slag immersed in sea water.","Muséum Nationale d’Histoire Naturelle, Paris, France, numbers 93.252, 95.98.","A secondary mineral.\r\nMay be confused with diaboleite.\r\n\r\nCorrect spelling defined by Burke (2008); other, incorrect spelling is cumengéite.","Named in honor of Bernard Louis Philippe Édouard Cumenge (16 April 1828, Castres, France - 20 July 1902, Paris, France), mining engineer at Boleo, Mexico. He collected the first specimens.","2026-02-03 16:26:43",[],[],[],[],[81],{"id":82,"txt":83,"latitude":84,"longitude":85,"country":86},2287,"Boleo District, Santa Rosalía, Mulegé Municipality, Baja California Sur, Mexico",27.328459,-112.298841,"Mexico",51,[89,94,98,103,108,113,117,121,125,130,135,139,144,148,152],{"id":90,"year":91,"html":92,"doi":93},17079021,1893,"Mallard, Ernest (1893) Sur la Boléite, la Cumengéite et la Percylite. \u003Ci>Bulletin de Minéralogie\u003C\u002Fi>,  16 (7) 184-195 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1893.2323'>doi:10.3406\u002Fbulmi.1893.2323\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Fwww.persee.fr\u002FdocAsPDF\u002Fbulmi_0366-3248_1893_num_16_7_2323.pdf' class='refpdflink'>\u003C\u002Fa>","10.3406\u002Fbulmi.1893.2323",{"id":95,"year":96,"html":97,"doi":11},16620091,1895,"Lacroix, Alfred (1895) Sur quelques minéraux des mines du Boléo (Basse-Californie) \u003Ci>Bulletin du Muséum national d'histoire naturelle \u003C\u002Fi>,  S. 1 Vol. 1. Muséum national d'histoire naturelle. 39-42 \u003Ca target='_blank' href='https:\u002F\u002Fwww.biodiversitylibrary.org\u002Fpartpdf\u002F327571' class='refpdflink'>\u003C\u002Fa>",{"id":99,"year":100,"html":101,"doi":102},399766,1906,"Friedel, Georges (1906) Contribution à l'étude de la boléite et de ses congénères. \u003Ci>Bulletin de Minéralogie\u003C\u002Fi>,  29 (2) 14-55 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1906.2769'>doi:10.3406\u002Fbulmi.1906.2769\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Fwww.persee.fr\u002FdocAsPDF\u002Fbulmi_0366-3248_1906_num_29_2_2769.pdf' class='refpdflink'>\u003C\u002Fa>","10.3406\u002Fbulmi.1906.2769",{"id":104,"year":105,"html":106,"doi":107},435240,1919,"Hadding, Assar (1919) Beitrag zur Kenntnis des Boleits und des Cumengits. \u003Ci>Geologiska Föreningen i Stockholm Förhandlingar\u003C\u002Fi>,  41 (2) 175-192 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1080\u002F11035891909444444'>doi:10.1080\u002F11035891909444444\u003C\u002Fa>","10.1080\u002F11035891909444444",{"id":109,"year":110,"html":111,"doi":112},104189,1930,"Goßner, B., Arm, M. (1930) VIII. Chemische und röntgenographische Untersuchungen an Stoffen und Kristallen von komplexer Bauart. \u003Ci>Zeitschrift für Kristallographie - Crystalline Materials\u003C\u002Fi>,  72 (1) 202-236 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1930.72.1.202'>doi:10.1524\u002Fzkri.1930.72.1.202\u003C\u002Fa>","10.1524\u002Fzkri.1930.72.1.202",{"id":114,"year":110,"html":115,"doi":116},104270,"Hocart-Strasbourg, R. (1930) II. Sur la détermination des paramètres de la boléite, de la pseudoboléite et de la cumengéite, au moyen des rayons X. \u003Ci>Zeitschrift für Kristallographie - Crystalline Materials\u003C\u002Fi>,  74 (1) 20-24 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1930.74.1.20'>doi:10.1524\u002Fzkri.1930.74.1.20\u003C\u002Fa>","10.1524\u002Fzkri.1930.74.1.20",{"id":118,"year":110,"html":119,"doi":120},104227,"Priedel, G. (1930) Sur la Boleite, la Pseudoboléite et la Cumengeite. Réponse à MM. Gossner et Arm. \u003Ci>Zeitschrift für Kristallographie, Mineralogie und Petrographie\u003C\u002Fi>,  73 (1-6). 147-158 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1930.73.1.147'>doi:10.1524\u002Fzkri.1930.73.1.147\u003C\u002Fa>","10.1524\u002Fzkri.1930.73.1.147",{"id":122,"year":123,"html":124,"doi":11},1118652,1951,"Palache, Charles; Berman, Harry; Frondel, Clifford (1951) \u003Ci>The System of Mineralogy\u003C\u002Fi> (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.",{"id":126,"year":127,"html":128,"doi":129},3164,1980,"Alun Humphreys, D., Thomas, John H., Williams, Peter A., Symes, Robert F. (1980) The chemical stability of mendipite, diaboleïte, chloroxiphite, and cumengéite, and their relationships to other secondary lead(II) minerals. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  43 (331) 901-904 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1980.043.331.13'>doi:10.1180\u002Fminmag.1980.043.331.13\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_43\u002F43-331-901.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1980.043.331.13",{"id":131,"year":132,"html":133,"doi":134},3827,1986,"Hawthorne, F. C., Groat, L. A. (1986) The crystal structure and chemical composition of cumengéite. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  50 (355) 157-162 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1986.050.355.21'>doi:10.1180\u002Fminmag.1986.050.355.21\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_50\u002F50-355-157.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1986.050.355.21",{"id":136,"year":137,"html":138,"doi":11},16641619,1997,"Anthony, John Williams, Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. - \u003Ci>Ed.\u003C\u002Fi> (1997) \u003Ci>Handbook of Mineralogy\u003C\u002Fi> Vol. 3 - Halides, Hydroxides, Oxides. Mineral Data Publishing, Tucson, Arizona. p.1-682.",{"id":140,"year":141,"html":142,"doi":143},243671,2005,"Cruciani, G., Orlandi, P., Pasero, M., Russo, M. (2005) First Italian occurrence of cumengéite from Vesuvius: crystal-structure refinement and revision of the chemical formula. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  69 (6) 1037-1045 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002F0026461056960306'>doi:10.1180\u002F0026461056960306\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FMM69_1037.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002F0026461056960306",{"id":145,"year":146,"html":147,"doi":11},12909745,2008,"Burke, Ernst A. J. (2008) Tidying up mineral names: an IMA-CNMNC scheme for suffixes, hyphens and diacritical marks. \u003Ci>The Mineralogical Record\u003C\u002Fi>,  39 (2) 131-135 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fuploads\u002FMR39_131.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":149,"year":150,"html":151,"doi":11},16963852,2021,"(2021) Cumengeite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002FCumengeite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":153,"year":154,"html":155,"doi":11},17561549,2022,"Panczner, W. D., Hamburgo, G. V. (2022) The discovery of boleite, cumengeite and pseudoboleite, in \u003Ci>Dzhezkazgan!\u003C\u002Fi>. \u003Ci>The Mineralogical Record\u003C\u002Fi>,  53 (4). 517-543",[157,167,176,185,193,200,207,213,220,228,235,241,247,254,260,266,276,283,291,299],{"id":158,"source_url":159,"license_code":160,"credit_html":161,"title":162,"description":163,"author":164,"original_width":165,"original_height":166},6598,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6622934","CC BY-SA 3.0","Didier Descouens, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6622934\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengite.jpg","\u003Ca href=\"\u002F\u002Fcommons.wikimedia.org\u002Fwiki\u002FCumengeite\" class=\"mw-redirect\" title=\"Cumengeite\">Cumengeite\u003C\u002Fa> - AMELIA MINE, BOLEO, SANTA ROSALIA, BAJA CALIFORNIA. \u003Ca href=\"\u002F\u002Fcommons.wikimedia.org\u002Fw\u002Findex.php?title=MEXICO&action=edit&redlink=1\" class=\"new\" title=\"MEXICO (page does not exist)\">MEXICO\u003C\u002Fa>  (16x12mm)","Didier Descouens",2344,2137,{"id":168,"source_url":169,"license_code":160,"credit_html":170,"title":171,"description":172,"author":173,"original_width":174,"original_height":175},6599,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174981","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174981\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-22506.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>A SHARP , complete floater twin of this extremely rare species from the type and best locality. Specimens of this calibre are almost impossible to obtain today! 0.9 x 0.8 x 0.8 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",400,375,{"id":177,"source_url":178,"license_code":179,"credit_html":180,"title":181,"description":182,"author":164,"original_width":183,"original_height":184},51330,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=8828760","CC BY 3.0","Didier Descouens, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=8828760\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","CumengiteII.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa> \n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico\u003C\u002Fdd>\n\u003Cdd>Soze (16x12mm)\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",3954,2862,{"id":186,"source_url":187,"license_code":160,"credit_html":188,"title":189,"description":190,"author":173,"original_width":191,"original_height":192},6601,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175363","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175363\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-51162.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>An incredible cumengeite of super high quality, the best I have seen for sale in fact. It has top lustre, deep blue color, and extremely good 6-point symmetry. It has one truncated rear termination and the bottom termination point is contacted (but you have to mount it somewhere, anyhow?!). Otherwise, it is complete and pristine. This is an incredible rarity and a chance to own a piece of such high calibre that few outside of the Sorbonne actually possess. One of the finest thumbnails I have had to offer... 1.3 x 1.1 x 1.1 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",600,552,{"id":194,"source_url":195,"license_code":160,"credit_html":196,"title":197,"description":198,"author":173,"original_width":199,"original_height":191},6602,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175402","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175402\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-53099.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 7.5 x 5 x 4 cm.\u003C\u002Fdd>\n\u003Cdd>This rare specimen is a treasure for both the quality and richness of matrix cumengeites, and its history. It features very bright, lustrous, sharp cumengeite twins to 6 mm on matrix of the typical soft claylike material, but infused strongly with veins of atacamite and anglesite which lend it a greater sturdiness than usually you see. I exchanged it out of Bill Larson's collection in trade. He got it while doing preparatory investigations prior to reopening and excavating the Amelia Mine in Boleo with Ed Swoboda, in their famous work of 1973 and on. While looking for people with knowledge of past operations from the Cumenge era, 1880s-1900, they found this specimen in Alamos with the son of one of the original miners, to whom it had been given by Cumenge (or taken...who can say?). I have Bill's handwriten card stating this history for the record. In any case, because of the size and richness, this is clearly not one from their 1970s remining operations. It is really unprecedented to be on the market and is a piece he had hoarded for a long time. It came to me only in a very highly leveraged trade.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",448,{"id":201,"source_url":202,"license_code":160,"credit_html":203,"title":204,"description":205,"author":173,"original_width":206,"original_height":174},6603,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175687","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175687\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-114170.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>This is a fine thumbnail specimen from the original expeditions of Cumenge in the late 1800s, ex. Sorbonne museum collections. It is a SHARP untwinned cumengeite, showing stereotypical classic form! Most cumengeite forms as twinned growth upon boleite crystals, and thus you have a starburst-shaped crystal habit. However, SOME FEW SPECIMENS from the original find, as is this one, show the untwinned habit. It is not quite pristine - there are a few small dings - but it has a good isplay face where they are hidden from view and \"it is what it is,\" a holy grail of thumbnail and rare species collectors! I have had cumengeites , some larger and priced much higher, in the past. I have NOT had such an example, though, of this habit, before. There is an old label accompanying it which notes that it is a rare untwinned crystal (one of two known to him), from the collection of a Dr. FP D'Esopo. I do not think it is THAT rare, but it IS pretty uncommon. Then again, I now realize the WP on his label indicates that he got the piece from Dr. William Pinch, and Bill tends to be right about these kidns of things....CLICK ON LABEL FOR LINK TO THE COLLECTOR ARCHIVES AT THE MINERALOGICAL RECORD WEBSITE, AND MORE INFORMATION. 1.0 x 0.6 x 0.6 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",308,{"id":208,"source_url":209,"license_code":160,"credit_html":210,"title":211,"description":198,"author":173,"original_width":174,"original_height":212},6604,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177528","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177528\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-260378.jpg",355,{"id":214,"source_url":215,"license_code":160,"credit_html":216,"title":217,"description":218,"author":173,"original_width":174,"original_height":219},6605,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177592","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177592\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-266101.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 1.4 x 1.4 x 1.4 cm\u003C\u002Fdd>\n\u003Cdd>(largest). The larger specimen here is 1.4 cm across, and is a classic, sharp, symmetrical cumengeite of high value. The piece dates to older material found at the turn of the 1900s. The smaller specimen next to it is from recent finds (recent meaning in the Larson\u002FSwoboda workings of 1973-1974), and is sharp and fine...but as you can see a bit different in habit from the older material. Either one, in this size, is rare on the market. This specimen from the Dr Miguel Romero collection was on loan exhibition to the University of Arizona Museum for over a decade, until my purchase of this collection in 2008. It was on display in special cases at the museum, and has since been featured in the book \"The Miguel Romero Collection of Mexico Minerals\" which we sponsored as a special supplement book (published by the Mineralogical Record in December of 2008).\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",269,{"id":221,"source_url":222,"license_code":160,"credit_html":223,"title":224,"description":225,"author":173,"original_width":226,"original_height":227},51332,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175658","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175658\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-85412.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Incredibly rare, relatively large cumengeite crystal with 5 of the 6 possible point swell developed (and mounted on a thin pedestal from the rear position). is from the 1970s finds here, after Bill Larson and Ed Swoboda rediscovered the 1890's-era locality. Before that time, the only cumengeite specimens were in a few museums. VERY HARD TO OBTAIN TODAY in any quality, of course! Formerly in the collection of and with label of Willard Perkins, the collector who invented the so-called \"Perky Box\" for thumbnails. 0.9 x 0.7 x 0.6 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",512,587,{"id":229,"source_url":230,"license_code":160,"credit_html":231,"title":232,"description":233,"author":173,"original_width":191,"original_height":234},51334,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441802","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441802\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengite-mz123a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengite\" class=\"extiw\" title=\"en:Cumengite\">Cumengite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.3 x 3.7 x 2.6 cm\n\u003Cdl>\u003Cdt>Cumengite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A very rare matrix specimen of this important Mexican rarity. It features an 8 mm complete cumengeite mounted nicely for display. The smaller crystal beneath provide color and sparkle, to make this a fairly flashy miniature for a species largely relegated to loose thumbnail crystals after all. 4.3 x 3.7 x 2.6 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",559,{"id":236,"source_url":237,"license_code":160,"credit_html":238,"title":239,"description":240,"author":173,"original_width":226,"original_height":227},51335,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10446761","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10446761\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengite-d06-116a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengite\" class=\"extiw\" title=\"en:Cumengite\">Cumengite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 0.9 x 0.7 x 0.6 cm\n\u003Cdl>\u003Cdt>Cumengite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Incredibly rare, relatively large cumengeite crystal with 5 of the 6 possible point swell developed (and mounted on a thin pedestal from the rear position). is from the 1970s finds here, after Bill Larson and Ed Swoboda rediscovered the 1890's-era locality. Before that time, the only cumengeite specimens were in a few museums. VERY HARD TO OBTAIN TODAY in any quality, of course! Formerly in the collection of and with label of Willard Perkins, the collector who invented the so-called \"Perky Box\" for thumbnails.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":242,"source_url":243,"license_code":160,"credit_html":244,"title":245,"description":246,"author":173,"original_width":206,"original_height":174},51336,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450684","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450684\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengite-k325a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengite\" class=\"extiw\" title=\"en:Cumengite\">Cumengite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 1.0 x 0.6 x 0.6 cm\n\u003Cdl>\u003Cdt>Cumengite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This is a fine thumbnail specimen from the original expeditions of Cumenge in the late 1800s, ex. Sorbonne museum collections. It is a SHARP untwinned cumengeite, showing stereotypical classic form! Most cumengeite forms as twinned growth upon boleite crystals, and thus you have a starburst-shaped crystal habit. However, SOME FEW SPECIMENS from the original find, as is this one, show the untwinned habit. It is not quite pristine - there are a few small dings - but it has a good isplay face where they are hidden from view and \"it is what it is,\" a holy grail of thumbnail and rare species collectors! I have had cumengeites , some larger and priced much higher, in the past. I have NOT had such an example, though, of this habit, before. There is an old label accompanying it which notes that it is a rare untwinned crystal (one of two known to him), from the collection of a Dr. FP D'Esopo. I do not think it is THAT rare, but it IS pretty uncommon. Then again, I now realize the WP on his label indicates that he got the piece from Dr. William Pinch, and Bill tends to be right about these kidns of things....CLICK ON LABEL FOR LINK TO THE COLLECTOR ARCHIVES AT THE MINERALOGICAL RECORD WEBSITE, AND MORE INFORMATION.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":248,"source_url":249,"license_code":160,"credit_html":250,"title":251,"description":246,"author":173,"original_width":252,"original_height":253},51337,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450685","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450685\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengite-k325b.jpg",425,594,{"id":255,"source_url":256,"license_code":160,"credit_html":257,"title":258,"description":259,"author":173,"original_width":191,"original_height":192},51340,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10464986","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10464986\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengite-t06-78a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengite\" class=\"extiw\" title=\"en:Cumengite\">Cumengite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 1.3 x 1.1 x 1.1 cm\n\u003Cdl>\u003Cdt>Cumengite (twinned)\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>An incredible cumengeite of super high quality, the best I have seen for sale in fact. It has top lustre, deep blue color, and extremely good 6-point symmetry. It has one truncated rear termination and the bottom termination point is contacted (but you have to mount it somewhere, anyhow?!). Otherwise, it is complete and pristine. This is an incredible rarity and a chance to own a piece of such high calibre that few outside of the Sorbonne actually possess. One of the finest thumbnails I have had to offer...\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":261,"source_url":262,"license_code":160,"credit_html":263,"title":264,"description":259,"author":173,"original_width":191,"original_height":265},51341,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10464987","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10464987\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengite-t06-78b.jpg",554,{"id":267,"source_url":268,"license_code":269,"credit_html":270,"title":271,"description":272,"author":273,"original_width":274,"original_height":275},51343,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=52419389","CC BY-SA 4.0","Phoebe, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=52419389\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Harvard Museum of Natural History. Cumengeite.jpg","Sample of the mineral cumengeite held in the Harvard Museum of Natural History. Sample from Baja California Mexico","Phoebe",3006,5344,{"id":277,"source_url":278,"license_code":160,"credit_html":279,"title":280,"description":281,"author":173,"original_width":282,"original_height":191},51331,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174983","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174983\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-Boleite-22519.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoleite\" class=\"extiw\" title=\"en:Boleite\">Boleite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>These 3 pictures do not do the specimen justice...this is a unique, 3-dimensional specimen featuring an untwinned 1 cm Cumengeite perched caddycorner on the side of a 1 cm boleite cube. I have never seen the like! Most such associations are imbalanced or the cumengeite covers up the boleite completely. This is showy, complete all around, and relatively large for what is available anywhere outside the cases of the Sorbonne. I think it makes for a competition-level thumbnail or rarity specimen. 1.8 x 1.4 x 1.2 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",476,{"id":284,"source_url":285,"license_code":160,"credit_html":286,"title":287,"description":288,"author":173,"original_width":289,"original_height":290},51333,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10176800","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10176800\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Cumengeite-Pseudoboleite-Boleite-215222.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPseudoboleite\" class=\"extiw\" title=\"en:Pseudoboleite\">Pseudoboleite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoleite\" class=\"extiw\" title=\"en:Boleite\">Boleite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 0.8 x 0.8 x 0.7 cm.\u003C\u002Fdd>\n\u003Cdd>This is an exemplary example of the epitaxial, or oriented serial growth, of these rare species one upon the other, with sharp form and good color as well. The Cumengeite is the sharp, pyramidal-like outgrowth popping out of one face of the central cube. All of the steppes upon the original simple cube of Boleite are in fact the related species Pseudoboleite. Thick Pseudoboleite epitaxially overgrew the Boleite cube, showing quite clearly even to the naked eye. Interestingly, only boleite is a silver species - the other two have no silver content. The crystals of all 3 species from this, the type locality, remain the best known by an order of magnitude, still today 100 and more years later. Ex. Dick Jones Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",510,535,{"id":292,"source_url":293,"license_code":160,"credit_html":294,"title":295,"description":296,"author":173,"original_width":297,"original_height":298},3583,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10461511","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10461511\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boleite-Cumengite-Pseudoboleite-rare-09-45ab.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoleite\" class=\"extiw\" title=\"en:Boleite\">Boleite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengite\" class=\"extiw\" title=\"en:Cumengite\">Cumengite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPseudoboleite\" class=\"extiw\" title=\"en:Pseudoboleite\">Pseudoboleite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Amelia Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSanta_Rosal%C3%ADa\" class=\"extiw\" title=\"en:Santa Rosalía\">Santa Rosalía (El Boleo)\u003C\u002Fa>, Boleo District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMuleg%C3%A9_(municipality)\" class=\"extiw\" title=\"en:Mulegé (municipality)\">Municipio de Mulegé\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBaja_California_Sur\" class=\"extiw\" title=\"en:Baja California Sur\">Baja California Sur\u003C\u002Fa>, Mexico (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-5565.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 0.8 x 0.8 x 0.7 cm\n\u003Cdl>\u003Cdt>Cumengeite and Pseudoboleite on Boleite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This is an exemplary example of the epitaxial, or oriented serial growth, of these rare species one upon the other, with sharp form and good color as well. The Cumengeite is the sharp, pyramidal-like outgrowth popping out of one face of the central cube. All of the steppes upon the original simple cube of Boleite are in fact the related species Pseudoboleite. Thick Pseudoboleite epitaxially overgrew the Boleite cube, showing quite clearly even to the naked eye. Interestingly (and I never realized this until now), only boleite is a silver species - the other two have no silver content. The crystals of all 3 species from this, the type locality, remain the best known by an order of magnitude, still today 100 and more years later. ex. Dick Jones collection (TYPE LOCALITY)\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",529,570,{"id":300,"source_url":301,"license_code":302,"credit_html":303,"title":304,"description":305,"author":306,"original_width":307,"original_height":308},51344,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=162645814","CC BY 4.0","Henk Smeets – tomeikminerals.com, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=162645814\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Gypsum, Cumengeite-13677 (Henk Smeets, tomeikminerals).jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGypsum\" class=\"extiw\" title=\"en:Gypsum\">Gypsum\u003C\u002Fa> with \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCumengeite\" class=\"extiw\" title=\"en:Cumengeite\">Cumengeite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Field of view: 5 mm high\u003C\u002Fdd>\n\u003Cdd>Locality: Juliushütte, Astfeld, Goslar District, Lower Saxony, Germany\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Henk Smeets – tomeikminerals.com",1920,1280,[310],{"id":311,"url":312,"label":313,"formula":314,"spacegroup":315,"year":132},3388,"\u002Fcif\u002F3388.cif","Hawthorne 1986","Pb21 Cu20 Cl42 (O40 H40)","I 4\u002Fm m m",[317,318,319,320,321],"Cumengeiet","Cumengit","Cumengita","Cumengite","Cumengite (of Groth)",[323,327,331,335,338,342,347],{"lang":324,"names":325},"ca",[326],"cumengeïta",{"lang":328,"names":329},"de",[330],"Cumengeit",{"lang":332,"names":333},"es",[334],"cumengeíta",{"lang":336,"names":337},"eu",[326],{"lang":339,"names":340},"fr",[341],"cumengéite",{"lang":343,"names":344},"it",[345,346],"cumengeite","cumengite",{"lang":348,"names":349},"pl",[330],"Q1143781",{"history":11,"applications":11}]