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Name: |
olivine (forsterite - fayalite) |
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Class: |
Silicates |
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Chemistry: |
(Mg,Fe)2 SiO4 Mg2 SiO4 - forsterite Fe2 SiO4 - fayalite |
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Color(s): |
brown-green, brown, dark green, apple green |
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Hardness: |
6.5 - 7.0 |
SpecGrav: |
3.27 - 3.37 |
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Fracture: |
brittle |
Cleavage: |
good |
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Crystal: |
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Envronment: |
occurs n several rocks as a rock formng mineral. Also in volcanic bombs. |
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Association: |
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Locals: |
| Canada | Russia | Az., Ca., USA | Italy | Pakistan | |
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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. |
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