[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:3252":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":21,"key_elements":11,"impurities":22,"cim":11,"ima_status":23,"ima_notes":11,"ima_history":11,"approval_year":25,"publication_year":26,"discovery_year":11,"strunz10ed1":27,"strunz10ed2":28,"strunz10ed3":29,"strunz10ed4":30,"dana8ed1":31,"dana8ed2":32,"dana8ed3":33,"dana8ed4":32,"csystem":34,"cclass":35,"spacegroup":36,"spacegroupset":37,"a":38,"b":39,"c":40,"alpha":37,"beta":37,"gamma":37,"aerror":41,"berror":42,"cerror":42,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":35,"csmetamict":13,"commentcrystal":11,"twinning":11,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":43,"tlform":44,"hmin":45,"hmax":45,"hardtype":11,"vhnmin":37,"vhnmax":37,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":46,"dmeas2":46,"dcalc":47,"dmeaserror":42,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":48,"commentluster":49,"diapheny":50,"streak":51,"colour":52,"commentcolor":11,"colors":53,"streak_colors":58,"luminescence":11,"uv":59,"cleavage":11,"cleavagetype":60,"fracturetype":11,"tenacity":61,"commentbreak":11,"opticaltype":62,"opticalsign":63,"opticalalpha":64,"opticalalpha2":37,"opticalalphaerror":11,"opticalbeta":65,"opticalbeta2":37,"opticalbetaerror":11,"opticalgamma":66,"opticalgamma2":37,"opticalgammaerror":11,"opticalomega":37,"opticalomega2":37,"opticalomegaerror":11,"opticalepsilon":37,"opticalepsilon2":37,"opticalepsilonerror":11,"opticaln":37,"opticaln2":37,"opticalnerror":11,"optical2vcalc":67,"optical2vcalc2":37,"optical2vcalcerror":11,"optical2vmeasured":68,"optical2vmeasured2":69,"optical2vmeasurederror":11,"rimin":70,"rimax":71,"opticaldispersion":72,"opticalpleochroism":73,"opticalpleochorismdesc":74,"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":11,"industrial":11,"occurrence":75,"otheroccurrence":76,"type_specimen_store":77,"description_short":78,"aboutname":79,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":80,"reviewed_at":11,"variety_of":11,"varieties":81,"group_members":82,"associates":83,"confused_with":84,"type_localities":85,"occurrence_total":92,"citations":93,"images":115,"structures":317,"synonyms":341,"language_names":344,"wikidata_qid":365,"texts":366},3252,"1:1:3252:6","50d3f63e-b407-431c-a3f5-081892ff328a","Poldervaartite","Pdv",0,"mineral",null,295,false,"CaCa[SiO\u003Csub>3\u003C\u002Fsub>(OH)](OH)","Ca(Ca,Mn)(SiO\u003Csub>3\u003C\u002Fsub>OH)(OH)",[17,18,19,20],"Ca","Si","O","H",[17,18,19,20],",Fe,Mg,H2O,",[24],"APPROVED",1992,1993,"9","A","F","90","78","1","8","Orthorhombic",8,61,"0","9.398","9.139","10.535",1,2,"Prismatic, sheaves","Colorless to milky white wheat-sheaf polycrystals and euhedral crystals.",5,"2.91","2.9","Vitreous,Sub-Vitreous","Vitreous on fractures","Transparent,Translucent","white","colourless, milky white, pink-white",[51,54,55,56,57],"colorless","pink","gray","blue",[51],"Deep red in SW","None Observed","very brittle","Biaxial","+","1.634","1.64","1.656","64","63","65",1.634,1.656,"r \u003C v weak","Weak","X= colorless\r\nY= light gray\r\nZ= bluish gray","Alteration of low-grade Mn-rich metasediments by hydrothermal fluids rich in Ca, Si02, and C02.","In massive manganese ore.","American Museum Natural History, New York, USA, T100728","The Ca-dominant analogue of Olmiite.\r\n\r\nNote: Most (all?) \"poldervaartites\" seem to be olmiites, see http:\u002F\u002Fwww.mindat.org\u002Fmesg-7-104499.html.","Name in honor of Arie Poldervaart (6 July 1918, Bandung, Indonesia – 28 October 1964, Manhattan, New York, USA), petrologist at Columbia University, New York. He made important contributions to the understanding of the South African Karoo dolerites and Archean rocks in the Kakamas area of northwest Cape Province.","2025-08-11 12:14:23",[],[],[],[],[86],{"id":87,"txt":88,"latitude":89,"longitude":90,"country":91},3071,"Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa",-27.1135346,22.8543941,"South Africa",4,[94,97,101,105,110],{"id":95,"year":26,"html":96,"doi":11},529542,"Dai, Yongshan, Harlow, George E., Mcghie, Andrew R. (1993) Poldervaartite, Ca(Ca0.5Mn0.5)(SiO3OH)(OH), a new acid nesosilicate from the Kalahari manganese field, South Africa: Crystal structure and description. \u003Ci>American Mineralogist\u003C\u002Fi>,  78 (9-10) 1082-1087 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM78\u002FAM78_1082.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":98,"year":99,"html":100,"doi":11},16121617,1997,"Mandarino, Joseph A. (1997) \u003Ci>New Minerals 1990-1994\u003C\u002Fi>. The Mineralogical Record Inc., Tuscon, Arizona. 220pp.",{"id":102,"year":103,"html":104,"doi":11},16966768,2001,"(2001) Poldervaartite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fpoldervaartite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":106,"year":107,"html":108,"doi":109},243750,2007,"Bonazzi, P., Bindi, L., Medenbach, O., Pagano, R., Lampronti, G. I., Menchetti, S. (2007) Olmiite, CaMn[SiO\u003Csub>3\u003C\u002Fsub>(OH)](OH), the Mn-dominant analogue of         poldervaartite, a new mineral species from Kalahari manganese fields (Republic of         South Africa). \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  71 (2). 193-201 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.2007.071.2.193'>doi:10.1180\u002Fminmag.2007.071.2.193\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FMM71_193.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.2007.071.2.193",{"id":111,"year":112,"html":113,"doi":114},16396412,2015,"Frost, Ray L., López, Andrés, Scholz, Ricardo, Lima, Rosa Malena Fernandes (2015) Vibrational spectroscopic study of poldervaartite CaCa[SiO\u003Csub>3\u003C\u002Fsub>(OH)(OH)]. \u003Ci>Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy\u003C\u002Fi>,  137. 827-831 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.saa.2014.09.017'>doi:10.1016\u002Fj.saa.2014.09.017\u003C\u002Fa>","10.1016\u002Fj.saa.2014.09.017",[116,126,132,142,149,156,164,171,178,185,192,198,206,213,219,225,231,237,243,249,259,266,272,278,283,289,296,303,309],{"id":117,"source_url":118,"license_code":119,"credit_html":120,"title":121,"description":122,"author":123,"original_width":124,"original_height":125},19717,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=3276363","Public domain","Vassil, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=3276363\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite 21207.jpg","Remplacé","Vassil",1489,884,{"id":127,"source_url":128,"license_code":119,"credit_html":129,"title":130,"description":131,"author":123,"original_width":124,"original_height":125},19718,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=3276380","Vassil, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=3276380\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite 21207 1.jpg","Poldervaartite. Provenance: mine de N'Chwaning, Kuruman, Afrique du Sud.",{"id":133,"source_url":134,"license_code":135,"credit_html":136,"title":137,"description":138,"author":139,"original_width":140,"original_height":141},74748,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441570","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441570\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-mrz196a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 3.5 x 3 x 2.6 cm\n\u003Cdl>\u003Cdt>Poldervaartite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A glistening, sparkly, wet-looking, rounded olmiite crystal on manganese matrix, of excellent quality. It is brilliantly colorful, gemmy, and naturally lustrous. A superb example of this find from 2003-2004. The crystal is about 1.6 x 1.5 cm. Ex. Martin Zinn Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",548,600,{"id":143,"source_url":144,"license_code":135,"credit_html":145,"title":146,"description":147,"author":139,"original_width":141,"original_height":148},19719,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441578","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441578\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-mrz208a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.5 x 3.6 x 3.3 cm\n\u003Cdl>\u003Cdt>Poldervaartite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A beautifully aesthetic example of the \"beige habit\" from this 2003-2004 find, with a single larger 3.2-cm ball of olmiite propped atop nicely trimmed matrix. This is a very large cluster and while this style doesn't have the famous red color, they are nonetheless significant for the species as well. Ex. Martin Zinn Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",545,{"id":150,"source_url":151,"license_code":135,"credit_html":152,"title":153,"description":138,"author":139,"original_width":154,"original_height":155},74749,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441571","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10441571\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-mrz196b.jpg",400,394,{"id":157,"source_url":158,"license_code":135,"credit_html":159,"title":160,"description":161,"author":139,"original_width":162,"original_height":163},19720,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450436","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450436\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k210a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning II Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3067.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.9 x 2.5 x 1.7 cm\n\u003Cdl>\u003Cdt>Poldervaartite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A sparkling stack of poldervaartite from the finds of 4 years ago, unusual in its vertical aspect. ppristine on front and complete on the front, contacted only in back.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",474,800,{"id":165,"source_url":166,"license_code":135,"credit_html":167,"title":168,"description":169,"author":139,"original_width":154,"original_height":170},74750,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10446181","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10446181\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-cktsr-31c.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning II Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3067.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: cabinet, 9 x 5 x 4 cm\n\u003Cdl>\u003Cdt>POLDERVAARTITE\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A true killer featuring a 4 x 3 x 3 cm cluster of GEMMY, GLASSY poldervaartite sitting starkly on contrasting matrix! ALMOST NEVER do you get such upright, 3-dimensional clusters! In fact, outside of a very few specimens now in Harvard or the Sacco collection, Charlie thought this to be the best of its style in this regard. It is important to see how much relief the piece has, to make the polder leap out at you visually, when compared to other specimens where the crystals are embedded or laying flat. Charlie felt very strongly that, amidst all that came out, he did get the chance to choose for himself several of the very best, shown here now for the first time since they were mined. Comes with custom lucite display base.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",217,{"id":172,"source_url":173,"license_code":135,"credit_html":174,"title":175,"description":176,"author":139,"original_width":163,"original_height":177},19721,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450564","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450564\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k265a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 3.9 x 2.4 x 2.3 cm\n\u003Cdl>\u003Cdt>Poldervaartite (from original find)\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This mineral was discovered in the 1980s but only recognized and named by 1993. Specimens were always extremely rare and hard to obtain. This one, Charlie was quite proud of and regarded as an important piece, worth perhaps 5k back in the day before a few years ago when Poldervaartite fortune was struck at the nearby NChwaning Mine. Literally, these were like beige gold to the collectors of Kalahari rarities! Now, OK, its a common enough species because of the new finds - BUT they are of totally different habit and these old ones are still both recognizable and desirable. This is a rare locality specimen, and probably (according to Charlie) a co-type with the material used to describe the species.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",537,{"id":179,"source_url":180,"license_code":135,"credit_html":181,"title":182,"description":183,"author":139,"original_width":163,"original_height":184},74751,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450528","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450528\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k249a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: cabinet, 9.8 x 4.9 x 4.1 cm\n\u003Cdl>\u003Cdt>Poldervaartite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>SIZE, folks! A huge 4 x 3.5 x 3.5 cm aggregate of crystallized Poldervaartite just dominates this matrix specimen, and stands at one end freestanding and complete all around, like a hot air balloon about to launch! It is a very impressive piece, overall\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",541,{"id":186,"source_url":187,"license_code":135,"credit_html":188,"title":189,"description":190,"author":139,"original_width":163,"original_height":191},19722,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450582","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450582\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k278a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.7 x 3.6 x 3.4 cm\n\u003Cdl>\u003Cdt>Poldervaartite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>It is hard to imagine any more dramatic example of this style, a lone single crystal , sitting there so starkly perched against the contrasting, black manganese ore. This poldervaartite crystal is 2 cm across and is pristine!\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",649,{"id":193,"source_url":194,"license_code":135,"credit_html":195,"title":196,"description":183,"author":139,"original_width":154,"original_height":197},74752,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450529","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450529\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k249b.jpg",251,{"id":199,"source_url":200,"license_code":135,"credit_html":201,"title":202,"description":203,"author":139,"original_width":204,"original_height":205},19723,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10467057","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10467057\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-de12a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3071.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 6.5 x 5.1 x 3.4 cm\n\u003Cdl>\u003Cdt>Poldervaartite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>TYPE LOCALITY. This mineral was discovered in the 1980s but only recognized later as a new species, and then named in 1992. Specimens were always extremely rare and hard to obtain. In fact, a good example was considered a hallmark and a token of any \"sophisticated\" Kalahari collection and they were traded like gold. This one, from the noted collection of Desmond Sacco, should be regarded as an important (and large) specimen of some rarity. It was worth perhaps much more back in the day before a few years ago when \"Poldervaartite gold\" was struck at the nearby NChwaning Mine. Then, these \"old style\" polders were reduced in value and desirability... However, as luck has it, all of the \"new\" poldervaartite turned out to actually be a related but different and new species now called Olmiite, thus re-enthroning these older specimens on their throne of rarity. Literally, these genuine older examples of the species are among the ultimate rarities to collectors of Kalahari material; and no more has been found since the original discovery , apparently ! I am told that, probably (according to Charlie Key), such specimens are co-type with the material used to describe the species, all from the same pocket. This is the LARGEST and showiest, least ugly (in a relative sense) specimen of the species I have ever seen for sale. It is actually attractive - VERY sugary and sparkly; and splayed in its presentation. We value it highly, yes, but it blows away any other I have seen on the market , and it comes from the ultimate pedigree in Kalahari collections, through a recent deaccession to me of some thumbnails and rarities from the Sacco collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",1800,1330,{"id":207,"source_url":208,"license_code":135,"credit_html":209,"title":210,"description":211,"author":139,"original_width":212,"original_height":163},74753,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450537","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450537\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k254a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 6.5 x 4.6 x 3.4 cm\n\u003Cdl>\u003Cdt>Poldervaartite (2 styles)\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This remarkable specimen displays in an unusually 3-dimensional manner two large ball-like aggregates of crystallized Poldervaartite: one the cherry-red, gemmy, bright variety (2.1 cm across); the other a more common style of opaque beige hue but in remarkable size of 4.5 x 4 x 2 cm. The dramatic nature of the specimen rests in the juxtaposition of the two forms of Poldervaartite , which gives it more impact than most specimens of either style alone in isolation.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",603,{"id":214,"source_url":215,"license_code":135,"credit_html":216,"title":217,"description":211,"author":139,"original_width":154,"original_height":218},74754,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450539","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450539\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k254c.jpg",349,{"id":220,"source_url":221,"license_code":135,"credit_html":222,"title":223,"description":190,"author":139,"original_width":224,"original_height":154},74757,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450583","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450583\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k278b.jpg",377,{"id":226,"source_url":227,"license_code":135,"credit_html":228,"title":229,"description":190,"author":139,"original_width":154,"original_height":230},74758,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450584","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450584\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-k278c.jpg",384,{"id":232,"source_url":233,"license_code":135,"credit_html":234,"title":235,"description":236,"author":139,"original_width":230,"original_height":154},74762,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10463450","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10463450\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-sn47a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 2.6 x 1.8 x 1.4 cm\n\u003Cdl>\u003Cdt>Poldervaartite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>One of the best thumbs I have see of the masterial, with super color and lustre, and very gemmy xls that you could cut gemstones out of. MUCH better in person and truly outstanding competition-level!\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":238,"source_url":239,"license_code":135,"credit_html":240,"title":241,"description":203,"author":139,"original_width":204,"original_height":242},74763,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10467064","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10467064\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-de12d.jpg",1786,{"id":244,"source_url":245,"license_code":135,"credit_html":246,"title":247,"description":203,"author":139,"original_width":204,"original_height":248},74764,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10476644","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10476644\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Poldervaartite-de12b.jpg",1304,{"id":250,"source_url":251,"license_code":252,"credit_html":253,"title":254,"description":255,"author":256,"original_width":257,"original_height":258},19724,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=44542003","CC BY-SA 4.0","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=44542003\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bultfonteinite, poldervaartite 7100.5041.jpg","bultfonteinite, poldervaartite : N’Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South-Africa","Géry PARENT",2000,1333,{"id":260,"source_url":261,"license_code":135,"credit_html":262,"title":263,"description":264,"author":139,"original_width":265,"original_height":154},74755,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450548","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450548\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Calcite-Poldervaartite-k257c.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalcite\" class=\"extiw\" title=\"en:Calcite\">Calcite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 6.1 x 4.1 x 2.5 cm\n\u003Cdl>\u003Cdt>Poldervaartite with Calcite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A really unusual specimen with both the red crystal and the beige spherical aggregate styles both on the same specimen in close contact, all accented by a few sparkly calcite crystals. Really wild combination! The lump you see in the center of the polder ball is a calcite crystal , and then next to it a slight gap int eh crystal coverage of the sphere. In person, that little dimple isn't as obvious because you tilt the specimen back for display instead of straight up as shown. Overall, though, this is a VERY cute combination piece and the juxtaposition of crystal forms of the same mineral on one piece is interesting.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",312,{"id":267,"source_url":268,"license_code":135,"credit_html":269,"title":270,"description":264,"author":139,"original_width":271,"original_height":163},74756,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450549","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450549\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Calcite-Poldervaartite-k257a.jpg",588,{"id":273,"source_url":274,"license_code":135,"credit_html":275,"title":276,"description":277,"author":139,"original_width":163,"original_height":191},74759,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450590","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450590\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Calcite-Poldervaartite-k282a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalcite\" class=\"extiw\" title=\"en:Calcite\">Calcite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning I Mine, N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3068.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: cabinet, 15.0 x 11.7 x 3.0 cm\n\u003Cdl>\u003Cdt>Poldervaartite on Calcite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A large plate with waxy-lustrous, beige polder crystals richly covering an undeerlaying matrix of bright and sparkly calcite! It is hard to get such nice large plates in good condition! This was found 5-6 years ago and I can say that large plates of the calcite intermix are particularly hard to come by, as they were snapped up for the beauty of the contrast. The poldervaartite in this style and association is not red like the styles shown above, but the calcite association makes up for it and gives quite a different look to the specimens in terms of visual appeal.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",{"id":279,"source_url":280,"license_code":135,"credit_html":281,"title":282,"description":277,"author":139,"original_width":265,"original_height":154},74760,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450591","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450591\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Calcite-Poldervaartite-k282b.jpg",{"id":284,"source_url":285,"license_code":135,"credit_html":286,"title":287,"description":277,"author":139,"original_width":288,"original_height":154},74761,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450593","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450593\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Calcite-Poldervaartite-k282c.jpg",390,{"id":290,"source_url":291,"license_code":252,"credit_html":292,"title":293,"description":255,"author":256,"original_width":294,"original_height":295},4138,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=44543628","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=44543628\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bultfonteinite, poldervaartite 7100.5126.jpg",1732,1256,{"id":297,"source_url":298,"license_code":252,"credit_html":299,"title":300,"description":255,"author":256,"original_width":301,"original_height":302},37413,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=45216793","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=45216793\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bultfonteinite, poldervaartite 7100.5223.jpg",1979,1701,{"id":304,"source_url":305,"license_code":252,"credit_html":306,"title":307,"description":255,"author":256,"original_width":25,"original_height":308},4137,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=40524382","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=40524382\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bultfonteinite, poldervaartite 7100.3018 .jpg",1538,{"id":310,"source_url":311,"license_code":135,"credit_html":312,"title":313,"description":314,"author":139,"original_width":315,"original_height":316},71882,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10122667","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10122667\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Bultfonteinite-Poldervaartite-27530.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBultfonteinite\" class=\"extiw\" title=\"en:Bultfonteinite\">Bultfonteinite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FPoldervaartite\" class=\"extiw\" title=\"en:Poldervaartite\">Poldervaartite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: N'Chwaning Mines, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKuruman,_Northern_Cape\" class=\"extiw\" title=\"en:Kuruman, Northern Cape\">Kuruman\u003C\u002Fa>, Kalahari manganese fields, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNorthern_Cape\" class=\"extiw\" title=\"en:Northern Cape\">Northern Cape Province\u003C\u002Fa>, South Africa (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-55925.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>This was the largest and best specimen I have yet seen from a small find of earlier this fall, at the N'Chwaning. This find literally redefines what you can ask for for the species Bultfonteinite, which usually occurs as a botryoidal aggregate (and then often covered by orlymanite) from the locality. THIS FIND, however, presents a significantly new habit for the species in the form of individual, acicular crystals to 7 or 8 mm in size. The white, acicular crystals liberally cover this large and attractive matrix plate which is also rich with small brown poldervaartite crystals. The piece is significant for both quality and size. 24.0 x 12.2 x 7.4 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",700,535,[318,325,330,336],{"id":319,"url":320,"label":321,"formula":322,"spacegroup":323,"year":324},11385,"\u002Fcif\u002F11385.cif","Marsh 1994","Ca2 Si O5 H2","P b c a",1994,{"id":326,"url":327,"label":328,"formula":329,"spacegroup":323,"year":26},11386,"\u002Fcif\u002F11386.cif","Dai 1993","Ca1.67 Mn.33 Si O5 H2",{"id":331,"url":332,"label":333,"formula":334,"spacegroup":335,"year":26},11387,"\u002Fcif\u002F11387.cif","Yano 1993","Ca2 Si O5","P 21 21 21",{"id":337,"url":338,"label":339,"formula":334,"spacegroup":323,"year":340},11388,"\u002Fcif\u002F11388.cif","Heller 1952",1952,[342,343],"IMA1992-012","Poldervaartiet",[345,349,354,358,361],{"lang":346,"names":347},"ca",[348],"poldervaartita",{"lang":350,"names":351},"de",[352,353],"IMA 1992-012","Poldervaartit",{"lang":355,"names":356},"eu",[357],"Poldervaartita",{"lang":359,"names":360},"it",[7],{"lang":362,"names":363},"pl",[364],"Poldervaartyt","Q3907216",{"history":11,"applications":11}]