Geology

Geology

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

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Geology > Minerals

maucherite

Geology; Minerals

Maucherite is a grey to reddish silver white nickel arsenide mineral. It crystallizes in the tetragonal crystal system. It occurs in hydrothermal veins alongside other nickel ...

alloclasite

Geology; Minerals

Alloclasite ((Co,Fe)AsS) is a sulfosalt mineral. It is a member of the arsenopyrite group. Alloclasite crystallizes in the monoclinic system and typically forms as columnar to ...

francolite

Geology; Minerals

Francolite is a carbonate rich variety of the mineral Fluorapatite and is present in most sedimentary phosphorites. It has a variable chemical composition which can be represented ...

sabieite

Geology; Minerals

Sabieite is a mineral with the chemical formula (NH 4 )Fe 3+ (SO 4 ) 2 . Its type locality is Lone Creek Falls cave, Sabie, Pilgrim's Rest District (Ehlanzeni), Mpumalanga ...

mascagnite

Geology; Minerals

Mascagnite is a rare ammonium sulfate mineral (NH 4 ) 2 SO 4 . It crystallizes in the orthorhombic system typically forming as stalactitic masses exhibiting good cleavage. It is ...

proustite

Geology; Minerals

Proustite is a sulfosalt mineral consisting of silver sulfarsenide, Ag 3 AsS 3 , known also as light red silver or ruby silver ore, and an important source of the metal. It is ...

tschermigite

Geology; Minerals

Tschermigite is a mineral form of ammonium alum, formula NH 4 AlSO 4 ·12(H 2 O). It is found in burning coal seams, bituminous shale and fumaroles. Because of its extreme water ...