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Dawsonite: NaAl(CO3)(OH)2
Comments: White, radial crystalline aggregates of dawsonite crystals. Location: Mont St. Hilaire, Quebec, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Derriksite: Cu4(UO2)(SeO3)2(OH)6
Comments: Light blue crystalline aggregates of derriksite. Location: Musonoi mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Devilline: CaCu4(SO4)2(OH)6·3(H2O) Malachite: Cu2(CO3)(OH)2
Comments: Blue crystals of devilline on green, botryoidal malachite. Location: Spania Dolina (Herrengrund), Slovakia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Diadochite: Fe+++2(PO4)(SO4)(OH)·6(H2O)
Comments: Brown balls of diadochite on matrix. Location: Union Carbide mine, Garland County, Arkansas, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Diamond: C
Comments: Single octahedral crystal of diamond. Location: Ghana, Africa. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Diaphorite: Pb2Ag3Sb3S8
Comments: Prismatic, striated, metallic diaphorite crystal on quartz. Location: Morey, Nye County, Nevada, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Digenite: Cu9S5
Comments: Bluish trigonal crystal of Digenite. Location: Butte, Silver Bow County, Montana, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Diopside: CaMgSi2O6 Grossular: Ca3Al2(SiO4)3
Comments: Pale blue prismatic crystal of diopside with orange-brown grossular. Location: Val d'Aosta, Italy. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
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
Dufrenoysite: Pb2As2S5
Comments: Black prismatic crystal of Dufrenoysite with brassy yellow pyrite on succroidal dolomite. Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals