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SAPPHIRE MINERAL                NATURAL COLOR             Hardness 9
 

 

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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.

 

 34.45 cts. Nice blue Sapphire crystal  single

22 x 20.7 mm.ORIGIN: Andranondambo

 USD 149.00 

ref: SAAbr3445c 

Hardness: 9 Andranondambo Sapphire Discovery
Specific Gravity: 3.9 - 4.1
Refractive Index: 1.76 - 1.78 Corundum data
Chemical Composition: Al2O3, Aluminum Oxide   Ask a question
Crystal Structure: Trigonal
Note that this sapphire can be found only near one occurrence to which the color of the stones is close to that of Kashmir. This type of sapphire is thus much rarer than ruby.
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