Name:

olivine (forsterite - fayalite)

A photo of the mineral olivine

Class:

Silicates

Chemistry:

(Mg,Fe)2 SiO4 Mg2 SiO4 - forsterite Fe2 SiO4 - fayalite

Color(s):

brown-green, brown, dark green, apple green

Hardness:

6.5 - 7.0

SpecGrav:

3.27 - 3.37

Fracture:

brittle

Cleavage:

good

Crystal:

Envronment:

occurs n several rocks as a rock formng mineral. Also in volcanic bombs.

Association:

Locals:

| Canada | Russia | Az., Ca., USA | Italy | Pakistan |

Misc:

Olivine is named for its green color, and ³fayalite² after Fayal, and island in the Azors. Foresterite is named after Johann R. Forester, a German naturalist. When found in large enough sizes Olivine is known as Peridot and used as gem in the jewelry trade.

Photos
& Locals:

1.) Sapat, Kohistan, Pakistan
2.) Sapat, Kohistan, Pakistan

3.) Sapat, Kohistan, Pakistan

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