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SAPPHIRE MINERAL
NATURAL COLOR
Hardness
9 |
|
Chemical properties:
corundum is composed of pure
alumina; its colouring is due to metallic | oxide traces or inclusions. The color of sapphire, due to iron and titanium oxide, gives its best | effect under daylight. Electric light makes it often dark. | Gems are generally found in alluvium, but come either from basaltic
slags, or from metamorphic
marble. | |
18.67
cts. blue Sapphire
tabular crystal single ( triangles on
one face )
15
x 12.5
x 7.5 mm. ORIGIN: Madagascar
USD
78.00
ref:
SAPbr1867c
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