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RUBY MINERAL
NATURAL COLOR
Hardness
9 |
|
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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Violet
Ruby,
tabular natural
crystal 34.76 cts.. / 27 x 23.5 x 4.4 mm (translucent) |
USD
100.00
ref
RUcrs3476c
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