[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:8574":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":20,"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":8,"strunz10ed2":8,"strunz10ed3":8,"strunz10ed4":8,"dana8ed1":21,"dana8ed2":21,"dana8ed3":21,"dana8ed4":21,"csystem":8,"cclass":8,"spacegroup":8,"spacegroupset":8,"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":8,"hmax":8,"hardtype":8,"vhnmin":8,"vhnmax":8,"vhnerror":8,"vhng":8,"vhns":8,"commenthard":8,"dmeas":21,"dmeas2":21,"dcalc":8,"dmeaserror":8,"dcalcerror":8,"commentdense":8,"lustre":8,"lustretype":8,"commentluster":8,"diapheny":8,"streak":8,"colour":8,"commentcolor":8,"colors":8,"streak_colors":8,"luminescence":8,"uv":8,"cleavage":8,"cleavagetype":8,"fracturetype":8,"tenacity":8,"commentbreak":8,"opticaltype":8,"opticalsign":8,"opticalalpha":8,"opticalalpha2":21,"opticalalphaerror":8,"opticalbeta":8,"opticalbeta2":21,"opticalbetaerror":8,"opticalgamma":8,"opticalgamma2":21,"opticalgammaerror":8,"opticalomega":8,"opticalomega2":21,"opticalomegaerror":8,"opticalepsilon":8,"opticalepsilon2":21,"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":8,"type_specimen_store":8,"description_short":8,"aboutname":8,"rock_parent":8,"rock_parent2":8,"rock_root":22,"rock_bgs_code":8,"meteoritical_code":8,"updttime":23,"reviewed_at":8,"variety_of":24,"varieties":32,"group_members":33,"associates":34,"confused_with":35,"type_localities":36,"occurrence_total":37,"citations":38,"images":39,"structures":74,"synonyms":75,"language_names":80,"wikidata_qid":8,"texts":81},8574,"1:1:8574:4","904aef34-7d19-434a-ac60-bdfd9918aad1","Satin Spar Gypsum",null,2,"variety",1784,415,false,"CaSO\u003Csub>4\u003C\u002Fsub>·2H\u003Csub>2\u003C\u002Fsub>O",[16,17,18,19],"Ca","O","S","H",[16,17,18,19],"0",0,"2025-08-11 12:14:29",{"id":11,"name":25,"entrytype":22,"csystem":26,"ima_formula":27,"mindat_formula":14,"hmin":9,"hmax":9,"dmeas":28,"dcalc":29,"strunz10ed1":30,"primary_image_id":31},"Gypsum","Monoclinic","Ca(SO\u003Csub>4\u003C\u002Fsub>) · 2H\u003Csub>2\u003C\u002Fsub>O","2.312","2.308","7",10652,[],[],[],[],[],42,[],[40,50,60,67],{"id":41,"source_url":42,"license_code":43,"credit_html":44,"title":45,"description":46,"author":47,"original_width":48,"original_height":49},78265,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=130438965","CC BY 4.0","Larry D. Moore, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=130438965\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Gypsum Caprock Canyons SP Texas 2023.jpg","Satin spar gypsum in sedimentary rock in \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCaprock_Canyons_State_Park_and_Trailway\" class=\"extiw\" title=\"w:Caprock Canyons State Park and Trailway\">Caprock Canyons State Park\u003C\u002Fa>, Texas, United States.","Larry D. Moore",3556,2000,{"id":51,"source_url":52,"license_code":53,"credit_html":54,"title":55,"description":56,"author":57,"original_width":58,"original_height":59},78266,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=146802468","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=146802468\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Satin spar gypsum (Cropwell Bishop Formation, Lower Triassic; near Derby, England) 1.jpg","Gypsum from the Triassic of England.\n\u003Cp>A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties.  At its simplest, a mineral is a naturally-occurring solid chemical.  Currently, there are over 6000 named and described minerals - about 200 of them are common and about 20 of them are very common.  Mineral classification is based on anion chemistry.  Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.\n\u003C\u002Fp>\u003Cp>The sulfate minerals all have one or more sulfate anions (SO4 -2).\n\u003C\u002Fp>\u003Cp>Gypsum is a moderately common hydrous calcium sulfate mineral (CaSO4·2H2O).  Gypsum has a nonmetallic luster, is usually clearish to whitish, is soft (H≡2), and rather fragile\u002Fbrittle.  Gypsum has 3 cleavage planes, one of which is well developed (“one good cleavage), and the other two are not well developed (“two poor cleavages”).  Broken gypsum specimens are frequently thin plates - the consequence of the one good cleavage plane.  Unbroken crystals show monoclinic symmetry.\n\u003C\u002Fp>\u003Cp>Gypsum has economic value as a mineral.  It is the starting ingredient for making plaster and wallboard.  Translucent rock gypsum (\"alabaster\") has been carved to make decorative objects.\n\u003C\u002Fp>\u003Cp>The sample seen here is composed of numerous, tightly-packed gypsum fibers - such specimens are nicknamed \"satin spar gypsum\".  It comes from an evaporite interval in an otherwise siliciclastics-dominated succession of Triassic-aged sedimentary rocks in central England.\n\u003C\u002Fp>\u003Cp>Stratigraphy: Cropwell Bishop Formation, upper Mercia Mudstone Group (a.k.a. \"Keuper Marl\"), Lower Triassic\n\u003C\u002Fp>\u003Cp>Locality: unrecorded \u002F undisclosed site (probably an old quarry or mine) near the town of Derby, central England\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Photo gallery of gypsum:\n\u003C\u002Fp>\nwww.mindat.org\u002Fgallery.php?min=1784","James St. John",2707,2126,{"id":61,"source_url":62,"license_code":53,"credit_html":63,"title":64,"description":56,"author":57,"original_width":65,"original_height":66},78267,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=146802469","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=146802469\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Satin spar gypsum (Cropwell Bishop Formation, Lower Triassic; near Derby, England) 2.jpg",2346,1839,{"id":68,"source_url":69,"license_code":53,"credit_html":70,"title":71,"description":56,"author":57,"original_width":72,"original_height":73},78268,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=146802470","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=146802470\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Satin spar gypsum (Cropwell Bishop Formation, Lower Triassic; near Derby, England) 3.jpg",3123,2003,[],[76,77,78,79],"Feather Gypsum","Plaister Stone","Satin Gypsum","Satin Stone",[],{"history":8,"applications":8}]