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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. | | |
|
Ruby, natural
tabular crystal 6.92
cts. / 15.2 x 13.1 x 2.6 mm.
( Deep red ) glossy |
USD
37
.00 ref
RUmita692c
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