's Image Gallery

Delafossite: Cu+Fe+++O2

Comments: Black crystals of delafossite on matrix.
Location: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Delhayelite: (Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3·18(H2O)

Comments: Gray to creamy delhayelite crystal in matrix.
Location: Mt. Rasvumchorr, Chibiny, Kola, Russia. Scale: Specimen Size 2.5x5 cm.
© Diederik Visser

Deliensite: Fe++(UO2)2(SO4)2(OH)2·3(H2O)

Comments: Specimen is covered with abundant micro crystals of deliensite.
Location: Mas d'Alary Village, Le Bosc Lodeve, Herault, France. Scale: Not Given.
© John Veevaert

Delindeite: Ba2(Na,K,[ ])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2

Comments: pale pink acicular crystal sprays of delindeite on matrix.
Location: Diamond Jo Quarry, Hot Spring County, Arkansas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Dellaite: Ca6Si3O11(OH)2  
Rustumite: Ca10(Si2O7)2(SiO4)Cl2(OH)2

Comments: White grains of dellaite, intermixed with rustumite.
Location: Queretaro, Zacatecas, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Dellaventuraite: NaNa2(Mg2,Mn+++,Li,Ti)Si8O22O2  
Aegirine-augite: (Ca,Na)(Mg,Fe++,Fe+++)[Si2O6]

Comments: View in plane-polarized light of reddish brown dellaventuraite (OPTK) as an overgrowth on purple-gray aegirine-augite (AE-AG) in a matrix of rounded quartz (QZ) with minor rounded (high relief) apatite grains. (AmMin 90:306).
Location: Kajlidongri manganese mine, Jhabua District, Madhya Pradesh, India. Scale: Picture size 2.5 cm.
© American Mineralogist

Deloneite-(Ce): NaCa2SrCe(PO4)3F

Comments: Pale yellow deloneite-(Ce) in matrix.
Location: Koashva Mt., Chibiny, Kola, Russia. Scale: Specimen Size 1.5x2.5 cm.
© Diederik Visser

Delrioite: CaSrV2O6(OH)2·3(H2O)  
Metadelrioite: CaSrV2O6(OH)2·(H2O)

Comments: Yellow metadelrioite and delrioite, with orange rossite/metarossite on a sandstone matrix. See inset image.
Location: Jo Dandy Mine, Montrose CO., USA. Scale: 6 1/4" x 5 1/2".
© Chris Wright / Wrights Rock Shop

Delvauxite: CaFe+++4(PO4,SO4)2(OH)8·4-6(H2O) (?)

Comments: Pure botryoidal massive delvauxite.
Location: Kutna Hora, Stredocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Demartinite: K2[SiF6]

Comments: SEM image of a tapering, hexagonal demartinite crystal. (CanMin, v45:1275).
Location: La Fossa crater, Vulcano, Eolian Islands, Italy.. Scale: See Image.
© Canadian Mineralogist

Demesmaekerite: Pb2Cu5(UO2)2(SeO3)6(OH)6·2(H2O)  
Malachite: Cu2(CO3)(OH)2

Comments: Pale green crystals of demesmaekerite on dark green malachite.
Location: Musonoi Mine, Katanga, Democratic Republic of the Congo. Scale: Crystal Size 3mm.
© John Veevaert

Demesmaekerite: Pb2Cu5(UO2)2(SeO3)6(OH)6·2(H2O)

Comments: Tabular, light green and spear-shaped dark greenish brown demesmaekerite crystals.
Location: Musonoi mine, Kolwezi, Shaba (Katanga), Congo (Zaïre). Scale: Picture size 3 mm.
© Paul M. Schumacher

Demicheleite-(Br): BiSBr

Comments: (SEM) image (BSE) of demicheleite. (AmMin, v93:1603).
Location: La Fossa crater, Vulcano, Aeolian Islands, Italy. Scale: See Image.
© American Mineralogist

Denisovite: (K,Na)Ca2Si3O8(F,OH)

Comments: Grayish-white fibrous denisovite.
Location: Eveslogchorr Mt , Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Denningite: (Mn,Zn)Te2O5  
Tellurite: TeO2

Comments: Vitreous colorless to very pale yellowish elongated crystals denningite with yellow tellurite.
Location: Bambolla Mine, Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Derbylite: (Fe+++,Fe++,Ti)7Sb+++O13(OH)

Comments: Small black crystals of derbylite in matrix.
Location: Buca della Vena Mine, Stazzema (Ponte Stazzemese), Versilia, Apuan Alps, Lucca Province, Tuscany, Italy. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

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

Desautelsite: Mg6Mn+++2(CO3)(OH)16·4(H2O)

Comments: Serpentinite with scaly reddish-orange crystals of desautelsite.
Location: Artinite Pit, San Benito County, California, USA. Scale: 3 x 4 cm.
© John Veevaert

Descloizite: PbZn(VO4)(OH)

Comments: Dark reddish brown, crystalline aggregate of descloizite.
Location: Grootfontein. Namibia. Scale: 3 cm.
© Fabre Minerals

Dessauite: (Sr,Pb)(Y,U)(Ti,Fe+++)20O38

Comments: SEM photograph of tabular {001} dessauite crystals on calcite. (AmMin v82:807).
Location: Buca della Vena mine, Tuscany, Italy. Scale: Scale bar: 0 .1mm.
© American Mineralogist