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RUBY MINERAL
NATURAL COLOR
Hardness
9 |
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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. | Gems are generally found in alluvium, but come either from basaltic
slags, or from metamorphic
marble. | | |
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Ruby, natural
tabular
crystal (translucent) 12.11 cts. / 18.1 x 14.5 x 3.7 mm.
( Deep red ) semi glossy
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USD
50.00 ref
RUrs1211c
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