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Djerfisherite: K6Na(Fe,Cu,Ni)25S26Cl
Comments: Bronze metallic grains of djerfisherite in white feldspar. Location: Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Djurleite: Cu31S16
Comments: Dark, metallic djurleite with transparent quartz and white calcite. Location: Dzhezkazgan. Kazakhstan. Scale: 4.5 x 4.5 cm. © Fabre Minerals
Dmisteinbergite: CaAl2Si2O8 Wairakite: CaAl2Si4O12·2(H2O)
Comments: Pearly platy crystalline dmisteinbergite with dull white wairakite on matrix. Location: Kurumazawa, Katashina, Gumma, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Dmitryivanovite: CaAl2O4
Comments: Inclusion consisting mainly of grossite (Gr) intergrown with perovskite (Pv) and melilite (Mel) that is pure gehlenite (Ak0) with dmitryivanovite (CaAl2O4). (AmMin, v94:746). Location: Northwest Africa 470 (NWA470) CH3 chondrite. Scale: See Image. © American Mineralogist
Dolerophanite: Cu2(SO4)O Chalcanthite: CuSO4·5(H2O) Fedotovite: K2Cu++3(SO4)3O
Comments: Brown crystals of dolerophanite with blue chalcanthite and green fedotovite. Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 3 mm. © Thomas Witzke / Abraxas-Verlag
Dollaseite-(Ce): CaCeMg2AlSi3O11(OH,F)2
Comments: Glassy brown crystalline grains of dollaseite-(Ce) in matrix. Location: Ostanmossagruvan, Norberg, Sweden. Scale: Grain size 1 mm. © Tom Loomis / Dakota Matrix
Dolomite: CaMg(CO3)2
Comments: Pink rhombohedral crystals of dolomite on matrix. Location: Eugui, Navarra Province, Navarra, Spain. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Dolomite: CaMg(CO3)2 Dissakisite-(Ce): Ca(Ce,REE)(Mg,Fe++)(Al,Fe+++)2Si3O12(OH)
Comments: Small, prisimatic, acicular crystals of tan-colored dissakisite-(Ce) scatterd on white crystalline dolomite. Location: Trimouns mine, Luzenac, Ariège France. Scale: Picture size 5 cm. © Fabre Minerals
Doloresite: H8V++++6O16
Comments: black radiating doloresite and crystalline doloresite with white calcite. Location: Grants, Valencia County, New Mexico, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Domeykite: Cu3As
Comments: Metallic nugget of domeykite. Location: Cashin Mine, Montrose County, Colorado, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Donathite: (Fe++,Mg)(Cr,Fe+++)2O4
Comments: Black granular donathite on iron. Location: Hestmondo Island, Nordland, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Donbassite: Al2[Al2.33][Si3AlO10](OH)8
Comments: Translucent white crystalline donbassite. Location: Donetz Basin, Ukraine. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Donharrisite: Ni8Hg3S9
Comments: BSE photomicrograph of donharrisite showing remnants of subhedral polydymite crystals. (CanMin, v27:257). Location: Found on a museum specimen from the former Erasmus miue, Schwardsp mining district, Leogang, Salzburg Province, Austria. Scale: Scale Bar 20 µm. © Canadian Mineralogist
Donnayite-(Y): Sr3NaCaY(CO3)6·3(H2O)
Comments: Brown micro-crystals of donnayite-(Y) covering matrix. Location: Mont. St. Hilaire, Rouville Co., Quebec, Canada. Scale: Picture size 1.5 cm. © Tom Loomis / Dakota Matrix
Donpeacorite: (Mn,Mg)MgSi2O6 Braunite-I: Mn++Mn+++6SiO12
Comments: Brown crystalline massive donpeacorite with dark brown black braunite. Location: Zinc Corporation of America Mine #4, Balmat, Saint Lawrence County, New York, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Donpeacorite: (Mn,Mg)MgSi2O6 Turneaureite: Ca5[(As,P)O4]3Cl Parvowinchite: Na(NaMn++)(Mg4Fe+++)Si8O22(OH)2
Comments: Colorless, transparent turneaureite masses with light brown tirodite (parvowinchite) and darker brown donpeacorite. Location: 2500' level of the mine, ZCA Mine No. 4 (St Joe Mine; ZCA No. 4 mine), Balmat, Balmat-Edwards Zinc District, St Lawrence Co., New York, USA. Scale: Picture Size 0.5 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Dorfmanite: Na2(PO3OH)·2(H2O)
Comments: White cottony coatings of dorfmanite on matrix. Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Dorrite: Ca2Mg2Fe+++4(Al,Fe+++)4Si2O20
Comments: Dark brown micaceous dorrite (arrow) on matrix. Location: Eicher, Sattel, Baden-Wurttemberg, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Douglasite: K2Fe++Cl4·2(H2O)
Comments: Small red-brown translucent grain of douglasite with white halite. Location: Koningshutte, Silesia, Poland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Dovyrenite: Ca6Zr[Si2O7]2(OH)4
Comments: BSE image of a large dovyrenite crystal in vesuvianite-foshagite skarn. Abbrev: dovyrenite (Dov), foshagite (Fsh), vesuvianite (Ves), calcite (Cal), (Mineralogia Polonica, v38: no 1, p18). Location: Dovyren Bald Mountain (Ioko-Dovyren layered massif), Siberia, Russia.. Scale: See Image. © Mineralogia Polonica