| Name: | corundum | ||||
| Class: | Oxide/Hydroxides | ||||
| Chemistry: | Al2O3 | ||||
| Color(s): | red (ruby), blue (sapphire), gray, black, yellow, purple, (just about all colors) streak: white | ||||
| Hardness: | 9 |
SpecGrav:
| 3.9 - 4.1 | ||
| Fracture: | tough |
Cleavage:
| none | ||
| Crystal: | hexagonal | ||||
| Envronment: | in pegmatites, in contact metamorphics, and in other metamorphic terrains. | ||||
| Association: | |||||
| Locals: | |Burma | China | Sri Lanka | NC, Mo., USA | | ||||
| 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. | ||||
Saturday, May 23, 2020
Corundum
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