| |
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. | |
Enlarge
|
29.07
cts.
blue Sapphire crystal single
23.4 x16 mm ORIGIN:
Andranondambo
|
USD 190.00
ref: CRSA2907c
|
|