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Name: |
corundum |
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Class: |
Oxide/Hydroxides |
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Chemistry: |
Al2O3 |
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Color(s): |
red (ruby), blue (sapphire), gray, black, yellow, purple, (just about all colors) streak: white |
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Hardness: |
9 |
SpecGrav: |
3.9 - 4.1 |
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Fracture: |
tough |
Cleavage: |
none |
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Crystal: |
hexagonal |
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Envronment: |
in pegmatites, in contact metamorphics, and in other metamorphic terrains. |
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Association: |
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Locals: |
|Burma | China | Sri Lanka | NC, Mo., USA | |
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Misc: |
The name comes from the ancient Sanskrit, ³kuruvinda² meaning ³ruby². It is derived from the Tamil ³kuruntam², which also came from the Sanskrit. Do to its hardness it is also used as an abrasive. |
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Photos |
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1.) var. ruby, China |
2.) var. ruby, China |
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