Geology

Geology

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

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Geology > Minerals

hauerite

Geology; Minerals

Hauerite is a manganese sulfide mineral with the chemical formula MnS 2 . It forms reddish brown or black octahedral crystals and it is usually found associated with the sulfides ...

nabesite

Geology; Minerals

Nabesite is a rare silicate mineral of the zeolite group with the chemical formula Na 2 BeSi 4 O 10 ·4(H 2 O). It occurs as colorless to white orthorhombic crystals in thin platy ...

carlosruizite

Geology; Minerals

Carlosruizite is a sulfate or selenate - iodate mineral with chemical formula: K 6 (Na,K) 4 Na 6 Mg 10 (SeO 4 ) 12 (IO 3 ) 12 ·12H 2 O. It has a low density (specific gravity of ...

heazlewoodite

Geology; Minerals

Heazlewoodite, Ni 3 S 2 , is a rare sulfur-poor nickel sulfide mineral found in serpentinitized dunite. It occurs as disseminations and masses of opaque, metallic light bronze to ...

bixbyite

Geology; Minerals

Bixbyite is a manganese iron oxide mineral with formula: (Mn,Fe) 2 O 3 . The iron/manganese ratio is quite variable and many specimens have almost no iron. It is a metallic dark ...

hodgkinsonite

Geology; Minerals

Hodgkinsonite is a rare zinc manganese silicate mineral Zn 2 MnSiO 4 (OH) 2 . It crystallizes in the monoclinic system and typically forms radiating to acicular prismatic crystals ...

nichromite

Geology; Minerals

Nichromite (Ni,Co,Fe)(Cr,Fe,Al) 2 O 4 is a black cubic metallic mineral and member of the spinel group. Nichromite was originally reported from the Bon Accord nickel deposit in ...