Geology

Geology

The scientific study of the origin, history, and physical features of the earth.

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Geology > Minerals

carrollite

Geology; Minerals

Carrollite, CuCo 2 S 4 , is a sulfide of copper and cobalt, often with substantial substitution of nickel for the metal ions, and a member of the linnaeite group. It is named ...

mackinawite

Geology; Minerals

Mackinawite is an iron nickel sulfide mineral with formula (Fe,Ni) 1 + x S (where x = 0 to 0.11). It crystallizes in the tetragonal crystal system and occurs as opaque bronze to ...

pharmacolite

Geology; Minerals

Pharmacolite is an uncommon calcium arsenate mineral with formula CaHAsO 4 ·2(H 2 O). It occurs as soft, white clusters of fibrous crystals and encrustations which crystallize in ...

tincalconite

Geology; Minerals

Tincalconite is a hydrous sodium borate mineral closely related to borax, and is a secondary mineral that forms as a dehydration product of borax. Its formula is Na 2 B 4 O 7 ·5H ...

cassiterite

Geology; Minerals

Cassiterite is a tin oxide mineral, SnO 2 . It is generally opaque, but it is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem. ...

nenadkevichite

Geology; Minerals

Nenadkevichite is a rare silicate mineral containing niobium with formula: (Na,Ca)(Nb,Ti)Si 2 O 7 ·2H 2 O. It forms brown to yellow to rose colored orthorhombic dipyramidal ...

trevorite

Geology; Minerals

Trevorite is a rare nickel iron oxide mineral belonging to the spinel group. It has the chemical formula NiFe 3+ 2 O 4 . It is a black mineral with the typical spinel properties ...