Geology

Geology

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

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Geology > Minerals

minnesotaite

Geology; Minerals

Minnesotaite is an iron silicate mineral with formula: (Fe 2+ ,Mg) 3 Si 4 O 10 (OH) 2 . It crystallizes in the triclinic crystal system and occurs as fine needles and platelets ...

umangite

Geology; Minerals

Umangite is a copper selenide mineral, Cu 3 Se 2 , discovered in 1891. It occurs only in small grains or fine granular aggregates with other copper minerals of the sulfide group. ...

papagoite

Geology; Minerals

Papagoite is a rare cyclosilicate mineral. Chemically, it is a calcium copper aluminium silicate hydroxide, found as a secondary mineral on slip surfaces and in altered ...

segelerite

Geology; Minerals

Segelerite is a complex phosphate mineral with formula CaMgFe 3+ OH(PO 4 ) 2 ·H 2 O. It occurs in pegmatites and forms striking green or chartreuse crystals. It was discovered in ...

sellaite

Geology; Minerals

Sellaite is a magnesium fluoride mineral with the formula MgF 2 . It crystallizes in the tetragonal crystal system typically as clear to white vitreous prisms. It may be fibrous ...

tourmaline

Geology; Minerals

Tourmaline is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a ...

breithauptite

Geology; Minerals

Breithauptite is a nickel antimonide mineral with the simple formula NiSb. Breithauptite is a metallic opaque copper-red mineral crystallizing in the hexagonal - dihexagonal ...