[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:32188":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":8,"polytypeof":8,"groupid":8,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":14,"mindat_formula_note":8,"ima_formula":8,"elements":15,"sigelements":19,"key_elements":8,"impurities":8,"cim":8,"ima_status":8,"ima_notes":8,"ima_history":8,"approval_year":8,"publication_year":8,"discovery_year":8,"strunz10ed1":20,"strunz10ed2":20,"strunz10ed3":20,"strunz10ed4":8,"dana8ed1":8,"dana8ed2":8,"dana8ed3":8,"dana8ed4":8,"csystem":8,"cclass":8,"spacegroup":8,"spacegroupset":20,"a":8,"b":8,"c":8,"alpha":8,"beta":8,"gamma":8,"aerror":8,"berror":8,"cerror":8,"alphaerror":8,"betaerror":8,"gammaerror":8,"va3":8,"z":8,"csmetamict":13,"commentcrystal":8,"twinning":8,"tranglide":8,"parting":8,"epitaxidescription":8,"morphology":8,"tlform":8,"hmin":21,"hmax":22,"hardtype":8,"vhnmin":8,"vhnmax":8,"vhnerror":8,"vhng":8,"vhns":8,"commenthard":8,"dmeas":23,"dmeas2":24,"dcalc":8,"dmeaserror":8,"dcalcerror":8,"commentdense":25,"lustre":8,"lustretype":26,"commentluster":8,"diapheny":27,"streak":28,"colour":29,"commentcolor":30,"colors":31,"streak_colors":35,"luminescence":8,"uv":36,"cleavage":8,"cleavagetype":37,"fracturetype":38,"tenacity":39,"commentbreak":8,"opticaltype":8,"opticalsign":8,"opticalalpha":8,"opticalalpha2":8,"opticalalphaerror":8,"opticalbeta":8,"opticalbeta2":8,"opticalbetaerror":8,"opticalgamma":8,"opticalgamma2":8,"opticalgammaerror":8,"opticalomega":8,"opticalomega2":20,"opticalomegaerror":8,"opticalepsilon":8,"opticalepsilon2":20,"opticalepsilonerror":8,"opticaln":8,"opticaln2":8,"opticalnerror":8,"optical2vcalc":8,"optical2vcalc2":8,"optical2vcalcerror":8,"optical2vmeasured":8,"optical2vmeasured2":8,"optical2vmeasurederror":8,"rimin":8,"rimax":8,"opticaldispersion":8,"opticalpleochroism":8,"opticalpleochorismdesc":8,"opticalbirefringence":8,"opticalcomments":8,"opticalcolour":8,"opticalinternal":8,"opticaltropic":8,"opticalanisotropism":8,"opticalbireflectance":8,"opticalextinction":8,"opticalr":8,"specdispm":8,"ir":8,"electrical":8,"magnetism":8,"thermalbehaviour":8,"other":8,"industrial":8,"occurrence":8,"otheroccurrence":40,"type_specimen_store":8,"description_short":8,"aboutname":41,"rock_parent":8,"rock_parent2":8,"rock_root":42,"rock_bgs_code":8,"meteoritical_code":8,"updttime":43,"reviewed_at":8,"variety_of":44,"varieties":47,"group_members":48,"associates":49,"confused_with":50,"type_localities":51,"occurrence_total":52,"citations":53,"images":72,"structures":375,"synonyms":376,"language_names":377,"wikidata_qid":8,"texts":378},32188,"1:1:32188:4","3b5f4e3e-74fc-42be-acf3-8f4c34eaeec1","Hyalite",null,2,"variety",1959,1610,false,"SiO\u003Csub>2\u003C\u002Fsub>·nH\u003Csub>2\u003C\u002Fsub>O",[16,17,18],"Si","O","H",[16,17,18],"0",5.5,6.5,"2.0","2.2","varies with water content","Vitreous,Sub-Vitreous","Transparent,Translucent","white","Colorless, white, creme-colored, yellow, orange","no opalescence (play of color)",[28,32,33,34],"colorless","yellow","orange",[28],"May show strong green UV fluorescence","None Observed","Conchoidal","brittle","Volcanic vugs, pegmatite pockets, fumaroles.\r\n","Named from ύαλος ('glass') from its appearance, by A.G. Werner in 1794.",0,"2025-08-11 12:14:57",{"id":11,"name":45,"entrytype":9,"csystem":8,"ima_formula":8,"mindat_formula":14,"hmin":21,"hmax":22,"dmeas":23,"dcalc":20,"strunz10ed1":20,"primary_image_id":46},"Opal-AN",59857,[],[],[],[],[],128,[54,58,62,67],{"id":55,"year":56,"html":57,"doi":8},16112330,1973,"Flörke, O.W., Jones, J.B., Segnit, E.R. (1973) The genesis of hyalite. Neues Jahrbuch der Mineralogie, Monatshefte, H.2, 82-89.",{"id":59,"year":60,"html":61,"doi":8},16121337,1994,"Graetsch, H. (1994) Structural characteristics of opaline and microcrystalline silica minerals. in: Heaney, P.J., Gibbs, G.V., editors. Reviews in Mineralogy Volume 29 Silica - Physical behaviour, geochemistry and materials applications. Mineralogical Society of America, 209-232.",{"id":63,"year":64,"html":65,"doi":66},298665,2016,"Othmane, Guillaume, Allard, Thierry, Vercouter, Thomas, Morin, Guillaume, Fayek, Mostafa, Calas, Georges (2016) Luminescence of uranium-bearing opals: Origin and use as a pH record. \u003Ci>Chemical Geology\u003C\u002Fi>,  423. 1-6 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.chemgeo.2015.12.010'>doi:10.1016\u002Fj.chemgeo.2015.12.010\u003C\u002Fa>","10.1016\u002Fj.chemgeo.2015.12.010",{"id":68,"year":69,"html":70,"doi":71},398381,2017,"Schindler, Michael, Fayek, Mostafa, Courchesne, Britanney, Kyser, Kurt, Hawthorne, Frank C. (2017) Uranium-bearing opals: Products of U-mobilization, diffusion, and transformation processes. \u003Ci>American Mineralogist\u003C\u002Fi>,  102 (6) 1154-1164 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-2017-5700'>doi:10.2138\u002Fam-2017-5700\u003C\u002Fa>","10.2138\u002Fam-2017-5700",[73,80,90,99,107,115,122,131,137,146,156,166,174,182,189,195,202,210,219,224,232,240,247,254,260,267,274,281,288,293,298,305,310,315,320,325,330,335,340,345,350,355,360,365,370],{"id":74,"source_url":75,"license_code":76,"credit_html":77,"title":7,"description":8,"author":8,"original_width":78,"original_height":79},88438,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F115023","CC BY 4.0","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F115023\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana",1000,666,{"id":81,"source_url":82,"license_code":83,"credit_html":84,"title":85,"description":86,"author":87,"original_width":88,"original_height":89},59846,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6632982","CC BY-SA 3.0","Didier Descouens, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6632982\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite.jpg","\u003Ca href=\"\u002F\u002Fcommons.wikimedia.org\u002Fwiki\u002FOpal\" title=\"Opal\">Opal\u003C\u002Fa> An(\u003Ca href=\"\u002F\u002Fcommons.wikimedia.org\u002Fwiki\u002FHyalite\" class=\"mw-redirect\" title=\"Hyalite\">Hyalite\u003C\u002Fa>) -  Puy de Corent - Soulasse - Puy de Dome - \u003Ca href=\"\u002F\u002Fcommons.wikimedia.org\u002Fwiki\u002FFrance\" title=\"France\">France\u003C\u002Fa> (53x43mm)","Didier Descouens",4592,3056,{"id":91,"source_url":92,"license_code":83,"credit_html":93,"title":94,"description":95,"author":96,"original_width":97,"original_height":98},59847,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10139349","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10139349\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Opal-118685.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Erongo Mountain, Usakos and Omaruru Districts, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-21818.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 16 x 13 x 3.5 cm.\u003C\u002Fdd>\n\u003Cdd>Very large plate of Hyalite Opal from the Erongo Mountains in Namibia. Superb classic fluorescence, as one would expect.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",500,378,{"id":100,"source_url":101,"license_code":83,"credit_html":102,"title":103,"description":104,"author":96,"original_width":105,"original_height":106},59848,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140242","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140242\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Opal-120690.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Squaretop Mountain, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKaimkillenbun,_Queensland\" class=\"extiw\" title=\"en:Kaimkillenbun, Queensland\">Kaimkillenbun\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FShire_of_Wambo\" class=\"extiw\" title=\"en:Shire of Wambo\">Wambo Shire\u003C\u002Fa>, Darling Downs-South West Region, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQueensland\" class=\"extiw\" title=\"en:Queensland\">Queensland\u003C\u002Fa>, Australia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-19073.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 3.0 x 1.8 x 1.4 cm.\u003C\u002Fdd>\n\u003Cdd>A cute, nicely shaped toenail of colorless, globular, jelly-like hyalite opal from an UNCOMMON Australian locality - Squaretop Mountain, Dalby (Kiamkillenbun ?), Queensland. A spot of brown matrix on the back adds character. Moderate lime-green fluorescence. Ex. Sam Nasser Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",246,400,{"id":108,"source_url":109,"license_code":83,"credit_html":110,"title":111,"description":112,"author":96,"original_width":113,"original_height":114},59853,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10163500","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10163500\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Opal-229624.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Erongo Mountain, Usakos and Omaruru Districts, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-21818.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 7.5 x 6.4 x 5.0 cm.\u003C\u002Fdd>\n\u003Cdd>A strangely formed granular\u002Fglobular hyalite opal specimen with strange looking fibrous\u002Fspindly sides from the Erongo Mountains of Namibia. Uncommon material from this famous locale. Classic yellow-green fluorescence. Ex. Rob Smith Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",750,743,{"id":116,"source_url":117,"license_code":83,"credit_html":118,"title":119,"description":120,"author":96,"original_width":113,"original_height":121},59854,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10164614","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10164614\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Opal-236602.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Squaretop Mountain, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKaimkillenbun,_Queensland\" class=\"extiw\" title=\"en:Kaimkillenbun, Queensland\">Kaimkillenbun\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FShire_of_Wambo\" class=\"extiw\" title=\"en:Shire of Wambo\">Wambo Shire\u003C\u002Fa>, Darling Downs-South West Region, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQueensland\" class=\"extiw\" title=\"en:Queensland\">Queensland\u003C\u002Fa>, Australia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-19073.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 3.9 x 3.0 x 2.3 cm.\u003C\u002Fdd>\n\u003Cdd>A fine, nicely shaped, 3-dimensional, mounded miniature of colorless, globular, jelly-like hyalite opal from an uncommon Australian locality - Squaretop Mountain, Dalby (Kiamkillenbun), Queensland. A spot of internal brown matrix adds character. Moderate lime-green fluorescence.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",562,{"id":123,"source_url":124,"license_code":83,"credit_html":125,"title":126,"description":127,"author":128,"original_width":129,"original_height":130},59862,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=15073015","Xth-Floor, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=15073015\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite opal Dubnik.jpg","Hyalite, Dubnik near Presov, Slovakia (1990)","Xth-Floor",1920,1280,{"id":132,"source_url":133,"license_code":83,"credit_html":134,"title":135,"description":136,"author":128,"original_width":129,"original_height":130},59863,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=15073018","Xth-Floor, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=15073018\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite opal Valec.jpg","Hyalite, Valec, Czech Republic",{"id":138,"source_url":139,"license_code":83,"credit_html":140,"title":141,"description":142,"author":143,"original_width":144,"original_height":145},59864,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32973337","Parent Géry, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32973337\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite 1100-1-1656.JPG","quartz var. opal-AN, var. hyalite : Tokaj, Zemplén Mts (Tokaj Mts), Borsod-Abaúj-Zemplén Co., Hungary","Parent Géry",4272,2848,{"id":147,"source_url":148,"license_code":149,"credit_html":150,"title":151,"description":152,"author":153,"original_width":154,"original_height":155},59865,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41110975","CC BY-SA 4.0","Géry PARENT, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41110975\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Opale-AN, staffelite 7100.4074.jpg","quartz var. hyalite var. opal-AN, fluorapatite var. staffelite : Valeč (Waltsch), Doupov (Duppau), Karlovy Vary Region, Bohemia (Böhmen ; Boehmen), Czech Republic","Géry PARENT",1975,1481,{"id":157,"source_url":158,"license_code":159,"credit_html":160,"title":161,"description":162,"author":163,"original_width":164,"original_height":165},57925,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500619","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500619\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Luminescent hyalite opal (Sierra Madre Occidental Volcanic Province, mid-Tertiary; Zacatecas, Mexico) 4 (35070319284).jpg","\u003Cp>Hyalite opal from the Tertiary of Mexico. (public display, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA)\n\u003C\u002Fp>\u003Cp>The yellowish- and greenish-glowing material shown above is hyalite opal (SiO2·nH2O - hydrous silica).  Hyalite is also known as glass opal.  It is composed of opal-AN, which refers to amorphous opal having a network structure similar to silica glass, rather than opal consisting of silica gel spheres\u002Fcolloids (most opal is the latter type).\n\u003C\u002Fp>\u003Cp>Hyalite is normally clear\u002Fcolorless.  Under incandescent lighting, this Mexican material is clear to extremely pale yellow.  The greenish coloration is a type of luminescence - fluorescence.  Under ultraviolet light (UV light; black light) and in direct sunlight and in indirect sunlight and in blue laser pointer light, this hyalite glows greenish.\n\u003C\u002Fp>\u003Cp>Published research has shown that the greenish luminescence is from ultraviolet excitation of uranyl impurities in the hyalite opal (Fritsch et al., 2015a, 2015b).  Uranyl is a UO2 +2 ion - uranium dioxide with a double positive electric charge.  This Mexican hyalite is indeed slightly radioactive, but the radiation levels do not pose a health risk (Fritsch et al., 2015b).  Several uranium-bearing minerals have been identified in the opal's host rocks, including meta-autunite, haiweeite, uranophane, meta-uranospinite, and others (Fritsch et al., 2015a).\n\u003C\u002Fp>\u003Cp>This specimen is luminescent botryoidal hyalite opal on a devitrified rhyolitic volcanic tuff matrix.  This new opal variety, discovered in 2013, has been nicknamed \"electric opal\".\n\u003C\u002Fp>\u003Cp>Geologic context & age: Sierra Madre Occidental Volcanic Province, mid-Tertiary\n\u003C\u002Fp>\u003Cp>Locality: undisclosed site on a high mesa in Zacatecas State, central Mexico\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Info. mostly synthesized from:\n\u003C\u002Fp>\u003Cp>Fritsch et al. (2015a) - Green-luminescing, gem hyalite opal from Zacatecas, Mexico.  34th International Gemmological Conference, August 2015, Vilnius, Lithuania: 101-104.\n\u003C\u002Fp>\nFritsch et al. (2015b) - Green-luminescing hyalite opal from Zacatecas, Mexico.  Journal of Gemmology 34: 490-508.","James St. John",4000,3000,{"id":167,"source_url":168,"license_code":159,"credit_html":169,"title":170,"description":171,"author":163,"original_width":172,"original_height":173},57922,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500410","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500410\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Luminescent hyalite opal (Sierra Madre Occidental Volcanic Province, mid-Tertiary; Zacatecas, Mexico) 1 (26442890801).jpg","\u003Cp>Hyalite opal from the Tertiary of Mexico. (~3.7 cm across)\n\u003C\u002Fp>\u003Cp>The gorgeous greenish-glowing material shown above is hyalite opal (SiO2·nH2O - hydrous silica).  Hyalite is also known as glass opal.  It is composed of opal-AN, which refers to amorphous opal having a network structure similar to silica glass, rather than opal consisting of silica gel spheres\u002Fcolloids (most opal is the latter type).\n\u003C\u002Fp>\u003Cp>Hyalite is normally clear\u002Fcolorless.  Under incandescent lighting, this Mexican material is clear to extremely pale yellow.  The greenish coloration is a type of luminescence - fluorescence.  Under ultraviolet light (UV light; black light) and in direct sunlight and in indirect sunlight and in blue laser pointer light, this hyalite glows greenish.\n\u003C\u002Fp>\u003Cp>Published research has shown that the greenish luminescence is from ultraviolet excitation of uranyl impurities in the hyalite opal (Fritsch et al., 2015a, 2015b).  Uranyl is a UO2 +2 ion - uranium dioxide with a double positive electric charge.  This Mexican hyalite is indeed slightly radioactive, but the radiation levels do not pose a health risk (Fritsch et al., 2015b).  Several uranium-bearing minerals have been identified in the opal's host rocks, including meta-autunite, haiweeite, uranophane, meta-uranospinite, and others (Fritsch et al., 2015a).\n\u003C\u002Fp>\u003Cp>This specimen is luminescent botryoidal hyalite opal on a devitrified rhyolitic volcanic tuff matrix.  This new opal variety, discovered in 2013, has been nicknamed \"electric opal\".\n\u003C\u002Fp>\u003Cp>Geologic context & age: Sierra Madre Occidental Volcanic Province, mid-Tertiary\n\u003C\u002Fp>\u003Cp>Locality: undisclosed site on a high mesa in Zacatecas State, central Mexico\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Info. mostly synthesized from:\n\u003C\u002Fp>\u003Cp>Fritsch et al. (2015a) - Green-luminescing, gem hyalite opal from Zacatecas, Mexico.  34th International Gemmological Conference, August 2015, Vilnius, Lithuania: 101-104.\n\u003C\u002Fp>\nFritsch et al. (2015b) - Green-luminescing hyalite opal from Zacatecas, Mexico.  Journal of Gemmology 34: 490-508.",2293,1795,{"id":175,"source_url":176,"license_code":159,"credit_html":177,"title":178,"description":179,"author":163,"original_width":180,"original_height":181},57923,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500414","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500414\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Luminescent hyalite opal (Sierra Madre Occidental Volcanic Province, mid-Tertiary; Zacatecas, Mexico) 2 (25904079264).jpg","\u003Cp>Hyalite opal from the Tertiary of Mexico. (~3.7 cm across)\n\u003C\u002Fp>\u003Cp>The gorgeous greenish-glowing material seen here is hyalite opal (SiO2·nH2O - hydrous silica).  Hyalite is also known as glass opal.  It is composed of opal-AN, which refers to amorphous opal having a network structure similar to silica glass, rather than opal consisting of silica gel spheres\u002Fcolloids (most opal is the latter type).\n\u003C\u002Fp>\u003Cp>Hyalite is normally clear\u002Fcolorless.  Under incandescent lighting, this Mexican material is clear to extremely pale yellow.  The greenish coloration is a type of luminescence - fluorescence.  Under ultraviolet light (UV light; black light) and in direct sunlight and in indirect sunlight and in blue laser pointer light, this hyalite glows greenish.\n\u003C\u002Fp>\u003Cp>Published research has shown that the greenish luminescence is from ultraviolet excitation of uranyl impurities in the hyalite opal (Fritsch et al., 2015a, 2015b).  Uranyl is a UO2 +2 ion - uranium dioxide with a double positive electric charge.  This Mexican hyalite is indeed slightly radioactive, but the radiation levels do not pose a health risk (Fritsch et al., 2015b).  Several uranium-bearing minerals have been identified in the opal's host rocks, including meta-autunite, haiweeite, uranophane, meta-uranospinite, and others (Fritsch et al., 2015a).\n\u003C\u002Fp>\u003Cp>This specimen is luminescent botryoidal hyalite opal on a devitrified rhyolitic volcanic tuff matrix.  This new opal variety, discovered in 2013, has been nicknamed \"electric opal\".\n\u003C\u002Fp>\u003Cp>Geologic context & age: Sierra Madre Occidental Volcanic Province, mid-Tertiary\n\u003C\u002Fp>\u003Cp>Locality: undisclosed site on a high mesa in Zacatecas State, central Mexico\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Info. mostly synthesized from:\n\u003C\u002Fp>\u003Cp>Fritsch et al. (2015a) - Green-luminescing, gem hyalite opal from Zacatecas, Mexico.  34th International Gemmological Conference, August 2015, Vilnius, Lithuania: 101-104.\n\u003C\u002Fp>\nFritsch et al. (2015b) - Green-luminescing hyalite opal from Zacatecas, Mexico.  Journal of Gemmology 34: 490-508.",2375,1815,{"id":183,"source_url":184,"license_code":159,"credit_html":185,"title":186,"description":162,"author":163,"original_width":187,"original_height":188},57924,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500613","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500613\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Luminescent hyalite opal (Sierra Madre Occidental Volcanic Province, mid-Tertiary; Zacatecas, Mexico) 3 (35909986495).jpg",2880,1810,{"id":190,"source_url":191,"license_code":159,"credit_html":192,"title":193,"description":162,"author":163,"original_width":194,"original_height":165},57927,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500621","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500621\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Luminescent hyalite opal (Sierra Madre Occidental Volcanic Province, mid-Tertiary; Zacatecas, Mexico) 5 (35740455092).jpg",3130,{"id":196,"source_url":197,"license_code":159,"credit_html":198,"title":199,"description":162,"author":163,"original_width":200,"original_height":201},57929,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500624","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84500624\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Luminescent hyalite opal (Sierra Madre Occidental Volcanic Province, mid-Tertiary; Zacatecas, Mexico) 6 (35101068653).jpg",2641,2103,{"id":203,"source_url":204,"license_code":205,"credit_html":206,"title":207,"description":208,"author":209,"original_width":164,"original_height":165},61541,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=75387056","CC BY-SA 2.0","Jan Helebrant (Juhele_CZ on Flickr) https:\u002F\u002Fwww.flickr.com\u002Fpeople\u002F96541566@N06\u002F, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=75387056\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite from Czech Republic.jpg","Hyalite (water opal) from Valeč in the Czech Republic. \n\u003Cp>photo (c) 2018 Jan Helebrant\n\u003C\u002Fp>\nwww.juhele.blogspot.cz","Jan Helebrant (Juhele_CZ on Flickr) https:\u002F\u002Fwww.flickr.com\u002Fpeople\u002F96541566@N06\u002F",{"id":211,"source_url":212,"license_code":149,"credit_html":213,"title":214,"description":215,"author":216,"original_width":217,"original_height":218},65250,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=65706012","Raimond Spekking, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=65706012\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Fluorescent opal, variety hyalite-1665.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa>, variety hyalite\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Dimensions: 2.1 cm × 1.9 cm × 1.2 cm\u003C\u002Fdd>\n\u003Cdd>Locality: Erongo, Namibia\u003C\u002Fdd>\n\u003Cdd>Description: Under ultraviolet light bright green fluorescent, granular hyalite aggregate from the collection of \u003Ca href=\"https:\u002F\u002Fde.wikipedia.org\u002Fwiki\u002FBenutzerin:Ra%27ike\" class=\"extiw\" title=\"de:Benutzerin:Ra'ike\">Ra'ike\u003C\u002Fa>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Raimond Spekking",4177,3133,{"id":220,"source_url":221,"license_code":149,"credit_html":222,"title":223,"description":8,"author":8,"original_width":78,"original_height":79},88439,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F61941","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F61941\" rel=\"noopener\">The Estonian Museum of Natural History\u003C\u002Fa> via Europeana","Opal",{"id":225,"source_url":226,"license_code":83,"credit_html":227,"title":228,"description":229,"author":96,"original_width":230,"original_height":231},59850,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10155122","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10155122\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Malachite-Opal-190490.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMalachite\" class=\"extiw\" title=\"en:Malachite\">Malachite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBurra_Burra_Mine\" class=\"extiw\" title=\"en:Burra Burra Mine\">Burra Burra Mine\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBurra\" class=\"extiw\" title=\"en:Burra\">Burra\u003C\u002Fa>, North Mt Lofty Ranges, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMount_Lofty_Ranges\" class=\"extiw\" title=\"en:Mount Lofty Ranges\">Mt Lofty Ranges\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSouth_Australia\" class=\"extiw\" title=\"en:South Australia\">South Australia\u003C\u002Fa>, Australia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-152.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 11.3 x 7.5 x 6.4 cm.\u003C\u002Fdd>\n\u003Cdd>A very unusual old piece from South Australia, with what seems to be hyalite opal (fluorescent) perched atop malachite. The malachite matrix is massive, with some veins of azurite. But, the malachite on top is crystalline, and velvety crystals of malachite contrast with the rounded white hyalite opal atop.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",768,800,{"id":233,"source_url":234,"license_code":83,"credit_html":235,"title":236,"description":237,"author":96,"original_width":238,"original_height":239},59851,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161194","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161194\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Opal-Rhodochrosite-Quartz-214888.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FRhodochrosite\" class=\"extiw\" title=\"en:Rhodochrosite\">Rhodochrosite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Santa Rita Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMorococha_District\" class=\"extiw\" title=\"en:Morococha District\">Morococha District\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FYauli_Province\" class=\"extiw\" title=\"en:Yauli Province\">Yauli Province\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FJun%C3%ADn_Department\" class=\"extiw\" title=\"en:Junín Department\">Junín Department\u003C\u002Fa>, Peru (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-123627.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 14.3 x 9.5 x 8.5 cm.\u003C\u002Fdd>\n\u003Cdd>A dramatic and striking cabinet combination specimen of a \"mountain\" of snow-white, sparkly, sponge-like, etched hyalite opal on layered quartz and sulfide matrix coated with beautifully contrasting, lustrous, pink rhodochrosite crystals from the Santa Rita Mine of Peru. This is a very showy and highly unusual large combination specimen, as the opal, in this case, does not fluoresce. Ex. David Ellis Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",700,492,{"id":241,"source_url":242,"license_code":83,"credit_html":243,"title":244,"description":245,"author":96,"original_width":246,"original_height":106},59852,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161496","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161496\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Opal-Schorl-215596.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTourmaline\" class=\"extiw\" title=\"en:Tourmaline\">Schorl\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Erongo Mountain, Usakos and Omaruru Districts, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-21818.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 11.3 x 4.5 x 3.2 cm.\u003C\u002Fdd>\n\u003Cdd>The jet black schorl is complete, pristine, and has incredible lustre. It is accented by a thin drapery of snowy white hyalite opal which was deposited on the schorl crystals, dripping down from above perhaps. The contrast could not be any starker, making this schorl a very showy specimen. Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",313,{"id":248,"source_url":249,"license_code":83,"credit_html":250,"title":251,"description":252,"author":96,"original_width":97,"original_height":253},59855,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10171235","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10171235\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Beryl-Orthoclase-Opal-272669.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBeryl\" class=\"extiw\" title=\"en:Beryl\">Beryl\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAquamarine\" class=\"extiw\" title=\"en:Aquamarine\">Aquamarine\u003C\u002Fa>), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOrthoclase\" class=\"extiw\" title=\"en:Orthoclase\">Orthoclase\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Erongo Mountain, Usakos and Omaruru Districts, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-21818.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 8 x 6 x 4 cm.\u003C\u002Fdd>\n\u003Cdd>This is a fine matrix piece of superb Aquamarines with gemmy lustre and intense Erongo-blue color. They stand upright and stark against a matrix of partially etched Orthoclase, capped in places by highly fluorescent Hyalite Opal overgrowth. The Aquamarines are terrific - excellent color and luster, gemmy terminations, and the largest is 5 cm tall. The termination, on its right side, shows a secondary growth: a thin layer of slightly different colored aquamarine atop the main core. Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",465,{"id":255,"source_url":256,"license_code":83,"credit_html":257,"title":258,"description":252,"author":96,"original_width":97,"original_height":259},59856,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10171236","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10171236\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Beryl-Orthoclase-Opal-272670.jpg",479,{"id":261,"source_url":262,"license_code":83,"credit_html":263,"title":264,"description":265,"author":96,"original_width":253,"original_height":266},59859,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174344","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10174344\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Gold-Opal-290319.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGold\" class=\"extiw\" title=\"en:Gold\">Gold\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Blue Bird Vein, Blue Bird Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBull_Hill\" class=\"extiw\" title=\"en:Bull Hill\">Bull Hill\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTeller_County,_Colorado\" class=\"extiw\" title=\"en:Teller County, Colorado\">Teller County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FColorado\" class=\"extiw\" title=\"en:Colorado\">Colorado\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-214970.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 7.1 x 4.4 x 3.7 cm.\u003C\u002Fdd>\n\u003Cdd>This exceptionally rare, unusual and rich association specimen is from the Blue Bird mine, which is just southeast of Cripple Creek in Colorado. The piece features several very small, micro \"wires\" of Gold which are coated by gemmy, spherical aggregates of colorless\u002Fwhite\u002Fgrey Opal (\"Hyalite\"), and are associated with Chalcopyrite crystals that are coated with Tetrahedrite. The reverse side of the specimen has minor crystals of well known Telluride, Sylvanite along with Dolomite, Celestine, light purple Fluorite, and a small vug with micro reddish-brown spherical aggregates of an unknown mineral. There are at least nine species on this specimen. To find Gold with Opal is rather uncommon in the mineral world, and specimens from this mine are virtually never available for purchase. This piece came from the well-known Colorado collection of Richard A. Kosnar, and his label states that the piece was collected in 1930 by a miner named Wilbur Wassau.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",349,{"id":268,"source_url":269,"license_code":83,"credit_html":270,"title":271,"description":272,"author":96,"original_width":97,"original_height":273},59860,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10176221","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10176221\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Quartz-Feldspar-Group-Opal-168090.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuartz\" class=\"extiw\" title=\"en:Quartz\">Quartz\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSmoky_quartz\" class=\"extiw\" title=\"en:Smoky quartz\">Smoky Quartz\u003C\u002Fa>), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFeldspar\" class=\"extiw\" title=\"en:Feldspar\">Feldspar\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa> (Var.: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal-AN\u003C\u002Fa>)\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Erongo Mountain, Usakos and Omaruru Districts, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-21818.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 10 x 8 x 6 cm.\u003C\u002Fdd>\n\u003Cdd>The \"normal\" Smoky is an impressive 3.8 cm, translucent, sitting beautifully on a large Feldspar crystal. What makes this truly unique are the rest of the Smokies. They are in two sets of 2 cm crystals, one set 6 cm long, the other 2 cm. The crystals are incredibly intergrown, resembling a spine. I am not sure if these are a series of Japan Law twins, intergrown Gwindels, or what. On top of that, literally, you have Hyalite Opal adding incredible accent to the piece. Ex. Charlie Key.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",419,{"id":275,"source_url":276,"license_code":83,"credit_html":277,"title":278,"description":279,"author":96,"original_width":280,"original_height":106},59861,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450349","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10450349\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Beryl-Opal-k-168b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBeryl\" class=\"extiw\" title=\"en:Beryl\">Beryl\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FOpal\" class=\"extiw\" title=\"en:Opal\">Opal\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Erongo Mountain, Usakos and Omaruru Districts, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-21818.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 4.0 x 3.8 x 3.6 cm\n\u003Cdl>\u003Cdt>Hyalite Opal on Goshenite Beryl\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>This specimen is notable both for the doubly-terminated goshenite and also for the richness of the hyalite opal, which glows intensely in ultraviolet light and is quite rare from here.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",396,{"id":282,"source_url":283,"license_code":205,"credit_html":284,"title":285,"description":286,"author":287,"original_width":164,"original_height":165},61542,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575632","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575632\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass water opal) - SiO2·nH2O (29177687237).jpg","\u003Cp>hyalite (glass \u002F water opal) - SiO2·nH2O\nlocality: Valeč, Czech Republic\nphoto (c) 2018 Jan Helebrant\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.juhele.blogspot.cz\">http:\u002F\u002Fwww.juhele.blogspot.cz\u003C\u002Fa>\" rel=\"nofollow\">www.juhele.blogspot.cz<\u002Fa>","Jan Helebrant",{"id":289,"source_url":290,"license_code":205,"credit_html":291,"title":292,"description":286,"author":287,"original_width":164,"original_height":165},61543,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575633","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575633\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass water opal) - SiO2·nH2O (29177682567).jpg",{"id":294,"source_url":295,"license_code":205,"credit_html":296,"title":297,"description":286,"author":287,"original_width":164,"original_height":165},61544,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575637","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84575637\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass water opal) - SiO2·nH2O (44066539962).jpg",{"id":299,"source_url":300,"license_code":205,"credit_html":301,"title":302,"description":303,"author":287,"original_width":304,"original_height":164},61546,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715715","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715715\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50583816162).jpg","\u003Cp>hyalite (glass \u002F water opal) - SiO2·nH2O\nlocality: Valeč, Czech Republic\nphoto (c) 2020 Jan Helebrant\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.juhele.blogspot.com\">http:\u002F\u002Fwww.juhele.blogspot.com\u003C\u002Fa>\" rel=\"noreferrer nofollow\">www.juhele.blogspot.com<\u002Fa>",6000,{"id":306,"source_url":307,"license_code":205,"credit_html":308,"title":309,"description":303,"author":287,"original_width":304,"original_height":164},61547,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715725","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715725\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50583015943).jpg",{"id":311,"source_url":312,"license_code":205,"credit_html":313,"title":314,"description":303,"author":287,"original_width":304,"original_height":164},61548,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715728","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715728\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50583741276).jpg",{"id":316,"source_url":317,"license_code":205,"credit_html":318,"title":319,"description":303,"author":287,"original_width":304,"original_height":164},61549,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715739","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715739\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50583733166).jpg",{"id":321,"source_url":322,"license_code":205,"credit_html":323,"title":324,"description":303,"author":287,"original_width":304,"original_height":164},61550,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715741","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715741\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50583729241).jpg",{"id":326,"source_url":327,"license_code":205,"credit_html":328,"title":329,"description":303,"author":287,"original_width":304,"original_height":164},61551,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715743","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715743\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50582986578).jpg",{"id":331,"source_url":332,"license_code":205,"credit_html":333,"title":334,"description":303,"author":287,"original_width":304,"original_height":164},61552,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715750","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715750\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50583716756).jpg",{"id":336,"source_url":337,"license_code":205,"credit_html":338,"title":339,"description":303,"author":287,"original_width":164,"original_height":165},61553,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715759","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715759\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass, water opal) - SiO2·nH2O from Valeč, Czech Republic (50582962038).jpg",{"id":341,"source_url":342,"license_code":205,"credit_html":343,"title":344,"description":303,"author":287,"original_width":304,"original_height":164},61554,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715761","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715761\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50582972533).jpg",{"id":346,"source_url":347,"license_code":205,"credit_html":348,"title":349,"description":303,"author":287,"original_width":304,"original_height":164},61555,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715762","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715762\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass - water opal) - SiO2·nH2O in Valeč, Czech Republic (50583840477).jpg",{"id":351,"source_url":352,"license_code":205,"credit_html":353,"title":354,"description":303,"author":287,"original_width":164,"original_height":165},61556,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715771","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715771\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass, water opal) - SiO2·nH2O from Valeč, Czech Republic (50582962698).jpg",{"id":356,"source_url":357,"license_code":205,"credit_html":358,"title":359,"description":303,"author":287,"original_width":164,"original_height":165},61557,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715774","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715774\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass, water opal) - SiO2·nH2O from Valeč, Czech Republic (50582960693).jpg",{"id":361,"source_url":362,"license_code":205,"credit_html":363,"title":364,"description":303,"author":287,"original_width":164,"original_height":165},61558,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715776","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715776\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass, water opal) - SiO2·nH2O from Valeč, Czech Republic (50583699741).jpg",{"id":366,"source_url":367,"license_code":205,"credit_html":368,"title":369,"description":303,"author":287,"original_width":164,"original_height":165},61559,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715777","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715777\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass, water opal) - SiO2·nH2O from Valeč, Czech Republic (50583817677).jpg",{"id":371,"source_url":372,"license_code":205,"credit_html":373,"title":374,"description":303,"author":287,"original_width":164,"original_height":165},61560,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715786","Jan Helebrant, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=97715786\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Hyalite (glass, water opal) - SiO2·nH2O from Valeč, Czech Republic (50582958768).jpg",[],[],[],{"history":8,"applications":8}]