Geology

Geology

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

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Geology > Minerals

berborite

Geology; Minerals

Berborite is a beryllium borate mineral with the chemical formula Be 2 (BO 3 )(OH,F)·(H 2 O). It is colorless and leaves a white streak. Its crystals are hexagonal to pyramidal. ...

krutovite

Geology; Minerals

Krutovite is a cubic nickel diarsenide with a chemical composition of NiAs 2 and a sulfur content of 0.02-0.34 weight percent (Vinogradova, et al., 1977). Krutovite is composed ...

andyrobertsite

Geology; Minerals

Andyrobertsite is a rare, complex arsenate mineral with a blue color. It is found in the Tsumeb mine in Namibia and named after Andrew C. Roberts (b. 1950), mineralogist with the ...

caryopilite

Geology; Minerals

Caryopilite (synonymous with ectropite and ektropite) is a brown-colored mineral with formula (Mn 2+ ,Mg) 3 Si 2 O 5 (OH) 4 . The mineral was discovered in 1889 from a mine in ...

ferroselite

Geology; Minerals

Orthorhombic ferroselite and its isometric polymorph dzharkenite are iron selenides of general formula FeSe 2 precipitated under reducing conditions in anoxic environments. They ...

manganosite

Geology; Minerals

Manganosite is a rare mineral composed of manganese(II) oxide MnO. It was first described in 1817 for an occurrence in the Harz Mountains, Saxony-Anhalt, Germany. It has also been ...

scrutinyite

Geology; Minerals

Scrutinyite is a rare oxide mineral and is the alpha crystalline form of lead dioxide (α-PbO 2 ), plattnerite being the other, beta form. The mineral was first reported in 1988 ...