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UNTREATED BI-COLOR SAPPHIRE    NATURAL COLOR   Hardness 9

RETURN TO »» SAPPHIRE BI-COLOR

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 metamorphized marble.
1.48 cts. Loose Trillon natural blue-yellow sapphire single
         
x Pieces: 1 Sapphire x x Type: 100% Natural
Color: Yellow-Blue Shape: Trillon faceted
Weight: 1.48  Carats Size: 7.9 x 8 mm
Clarity: NFL Luster: Excellent
Treatment: None (N) Origin: Madagascar
Comment: Medium blue-yellow.
Refr. Index: 1.76-1.78 Hardness 9
Hand cut by one of our  Depth:4.2 mm.
masters lapidaries. Not treated in any way.  

Stone Price:  SOLD

ref:SAybt148

       

   
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- Scale determining the purity of a stone.  -
FL NFL SI1 SI2 MI1
Flaw less Near flaw less Slightly included 1 Slightly included 2 Medium included 1
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
MI2 MI3 VI1 VI2 HI
Medium included 2 Medium included 3 Very included 1 Very included 2 Highly included
Hardness: 9
Specific Gravity: 3.9 - 4.1   Visual Catalog
Refractive Index: 1.76 - 1.78 Corundum data
Chemical Composition: Al2O3, Aluminum Oxide
Crystal Structure: Trigonal    Cutting Styles
Sapphire Discovery   Ask a question
 
 
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