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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 (translucent) 15.93 cts. / 20 x 17 x 3.5 mm.
( Deep red ) semi glossy |
USD
58
.00 ref
RUrs1593c
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