Devilline: Properties and Occurrences
Devilline is a sulfate mineral with the chemical formula CaCu4(SO4)2(OH)6•3H2O. The name originates from the French chemist’s name, Henri Etienne Sainte-Claire Deville (1818–1881). It forms…
Geographic Minerals
Descloizite: Properties and Occurrence
Descloizite is a mineral consisting of a basic vanadate chiefly of lead and zinc and varying in color from cherry red to brown and black.…
Derriksite: Properties and Occurrences
Derriksite is an orthorhombic-pyramidal mineral containing copper, hydrogen, oxygen, selenium, and uranium. It is a very rare uranium mineral with the chemical formula Cu4(UO2)(SeO3)2(OH)6•H2O. It…
Demesmaekerite
Demesmaekerite is a triclinic-pinacoidal mineral containing copper, hydrogen, lead, oxygen, selenium, and uranium. It is a uranium mineral with the chemical formula: Pb2Cu5(UO2)2(SeO3)6(OH)6•2H2O. It is…
Delvauxite
Delvauxite, also known as borickite, is a yellow to brown to dark brown amorphous mineral, sometimes forming a botryoidal mass. It is a mineral approximately…
Delafossite: Properties and Occurrences
Delafossite is a copper iron oxide mineral with formula CuFeO2 or Cu1+Fe3+O2. It is a mineral consisting of an oxide of copper and iron formerly…
Dawsonite: Properties and Occurrences
Dawsonite is a mineral composed of sodium aluminum carbonate hydroxide, chemical formula NaAlCO3(OH)2. It is an orthorhombic mineral composed of sodium aluminum carbonate hydroxide. It…
Daubréelite: Properties and Occurrences
Daubréelite is a rare sulfide mineral. It crystallizes with cubic symmetry and has a chemical composition of Fe2+Cr3+2S4. It is a mineral consisting of a…
Daubréeite: Properties and Occurrences
Daubréeite is a rare bismuth oxohalide mineral with formula BiO(OH, Cl). It is a sulphide of chromium observed in some meteoric irons. It is a…
Datolite: Properties and Occurrences
Datolite is a calcium boron hydroxide nesosilicate, CaBSiO4(OH). It is a popular mineral among mineral collectors although it is somewhat obscure. It was first observed…
Danburite: Properties and Occurrences
Danburite is a calcium boron silicate mineral with a chemical formula of CaB2(SiO4)2. It is a mineral consisting of a calcium borosilicate that is transparent…
Danalite: Properties and Occurrences
Danalite is an iron beryllium silicate sulfide mineral with formula: Fe2+4Be3(SiO4)3S. It is beryllium-bearing, and found typically in tin-beryllium skarns, but also found in NYF…
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