Geology

Geology

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

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Geology > Minerals

turquoise

Geology; Minerals

Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl 6 (PO 4) 4 (OH) 8 ·4H 2O. It is rare and valuable ...

kremersite

Geology; Minerals

Kremersite is a rare mineral which is a hydrated multiple chloride of iron, ammonium and potassium with the formula: (NH 4 ,K) 2 FeCl 5 ·H 2 O. Kremersite is a brown-red to orange ...

alluaivite

Geology; Minerals

Alluaivite is an exceedingly rare mineral of the eudialyte group, with complex formula written as Na 19 (Ca,Mn) 6 (Ti,Nb) 3 Si 26 O 74 Cl·2H 2 O. It is unique among the eudialyte ...

sauconite

Geology; Minerals

Sauconite is a complex phyllosilicate mineral of the smectite clay group, formula Na 0.3 Zn 3 (SiAl) 4 O 10 (OH) 2 ·4H 2 O. It forms soft earthy bluish white to red-brown ...

fukuchilite

Geology; Minerals

Fukuchilite, Cu 3 FeS 8 , is a copper iron sulfide named after the Japanese mineralogist Nobuyo Fukuchi (1877-1934), that occurs in ore bodies of gypsum-anhydrite at the ...

garnet

Geology; Minerals

Garnets are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. Garnets possess similar physical properties and crystal forms but ...

monticellite

Geology; Minerals

Monticellite and kirschsteinite are gray silicate minerals of the olivine group with compositions CaMgSiO 4 and CaFeSiO 4 , respectively. Most monticellites have the pure ...