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Decrespignyite-(Y): (Y,REE)4Cu(CO3)4Cl(OH)5·2(H2O)
Comments: Blue, rounded aggregates of decrespignyite-(Y) on matrix. Location: Paratoo copper mine, Yunta, Olary Province, South Australia, Australia. Scale: Picture size 2 mm. © Thomas Witzke / Abraxas-Verlag
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
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
Dickthomssenite: Mg(V+++++2O6)·7(H2O)
Comments: Yellowish white, prismatic crystals of dickthomssenite on matrix. Location: Firefly-Pigmay Mine, La Sal Quadrangle, San Juan Co., Utah, USA. Scale: Picture size 2 mm. © Thomas Witzke / Abraxas-Verlag
Dimorphite: As4S3
Comments: Orange to yellow-orange crystals of dimorphite on matrix. Location: Solfatara di Pozzuoli, Vesuvius, Naples, Naples province, Campania, Italy. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
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
Dufrenite: Fe++Fe+++4(PO4)3(OH)5·2(H2O)
Comments: Dark olive-greenish crystal of dufrenite on matrix. Location: Rengersdorf, Görlitz, Oberlausitz, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Dumortierite: Al6.5-7(BO3)(SiO4)3(O,OH)3
Comments: Blue dumortierite in matrix. Location: Hartmannsdorf, Chemnitz, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Duranusite: As4S Realgar: AsS
Comments: Small black Duranusite in orange-red realgar matrix. Location: Duranus, Alpes-Maritimes, Provence-Alpes-Côte d'Azur, France. Scale: Picture size 1.3 mm. © Thomas Witzke / Abraxas-Verlag
Dypingite: Mg5(CO3)4(OH)2·5(H2O)
Comments: White spherical aggregates of dypingite on matrix. Location: Jeremias Glück Mine (Fairy Grotto), Garnsdorf, Saalfeld, Thuringia, Germany. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Edoylerite: Hg++3Cr++++++O4S2 Cinnabar: HgS
Comments: Yellow prismatic crystals of edoylerite with red cinnabar. Location: Clear Creek Claim (Clear Creek Mine), New Idria district, San Benito Co., California, USA. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag
Efremovite: (NH4)2Mg2(SO4)3
Comments: White, massive efremovite. The mineral is hygroscopic and must be stored in a closed box. Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 6 mm. © Thomas Witzke / Abraxas-Verlag
Eglestonite: Hg6Cl3O(OH) (?)
Comments: Small yellow crystals and massive aggregates of eglestonite. Location: Landsberg (Moschellandsberg), Obermoschel, Palatinate, Rhineland-Palatinate, Germany. Scale: Picture size 0.8 mm. © Thomas Witzke / Abraxas-Verlag
Ellestadite-(OH): Ca5(SiO4,SO4)3(OH,Cl,F) Yeelimite: Ca4Al6O12(SO4)
Comments: Ye'elimite and hydroxylellestadite intimately intergrown as a brownish aggregate in massive anhydrite. Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 6 mm. © Thomas Witzke / Abraxas-Verlag
Elpasolite: K2NaAlF6
Comments: Colorless crystal of elpasolite in matrix. Location: Cetine di Cotorniano mine (Cetine mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 2.5 mm. © Thomas Witzke / Abraxas-Verlag
Emmonsite: Fe+++2Te++++3O9·2(H2O) Schmitterite: (UO2)TeO3
Comments: Yellow schmitterite with green emmonsite. Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Ericaite: (Fe++,Mg,Mn)3B7O13Cl
Comments: Cubic crystal ericaite. Location: Bischofferode, Nordhausen, Erfurt district, Harz Mts, Thuringia, Germany. Scale: Crystal size 3.7 mm. © Thomas Witzke / Abraxas-Verlag
Eriochalcite: CuCl2·2(H2O)
Comments: Green grains of eriochalcite from the eruption of 1875, Vesuvius volcano. Location: Vesuvius volcano. Vesuvius, Naples, Naples province, Campania, Italy. Scale: Picture size 3 mm. © Thomas Witzke / Abraxas-Verlag