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| RUBY MINERAL NATURAL COLOR Hardness 9 |
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| RETURN TO »» RUBY MINERAL | |
| Corundum is composed of pure alumina; its colouring is due to metallic | ||
| oxide traces or inclusions. The color of ruby is due to chromium oxide. | ||
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| Pink Ruby, tabular natural crystal 23.97 cts.. / 22.2 x 17.5 x 4.9 mm (translucent) |
| USD
75.00
ref
RUcrs2397c |
| Hardness: | 9 | 
Ruby
discovery
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| Specific Gravity: | 3.9 - 4.1 | |
| Refractive Index: | 1.76 - 1.78 |  Corundum
data |
| Chemical Composition: | Al2O3, Aluminum Oxide | 
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question |
| Crystal Structure: | Trigonal |
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