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| Apatite | ||
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| Danburite | ||
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| Hessonite | ||
| Malaya | ||
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| Ruby | ||
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| Labrador | ||
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| Rhodolite | ||
| Ruby | ||
| Spessart. | ||
| Sap.Slice | ||
| Cab. Sapp | ||
| Tourmalin | ||
| Cat's eye | ||
| Green | ||
| Pink | ||
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| Polychro. | ||
| Rubellite | ||
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| RUBY MINERAL NATURAL COLOR Hardness 9 |
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| RETURN TO »» RUBY MINERAL | |
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Corundum is composed of pure alumina; its colouring is due to metallic |
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| oxide traces or inclusions. The color of ruby is due to chromium oxide. | ||
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| Ruby, natural tabular crystal 6.92 cts. / 15.2 x 13.1 x 2.6 mm. ( Deep red ) glossy |
USD 37 .00 ref RUmita692c  |
| Hardness: | 9 |  Ruby discovery |
| Specific Gravity: | 3.9 - 4.1 | |
| Refractive Index: | 1.76 - 1.78 |  Corundum data |
| Chemical Composition: | Al2O3, Aluminum Oxide |  Ask a question |
| Crystal Structure: | Trigonal | |
| Ruby Mine Discovery |
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