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UNTREATED BLUE SAPPHIRE    NATURAL COLOR   Hardness 9
Online Certificate
RETURN TO »» NATURAL BLUE SAPPHIRE

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.
2.38 cts. Oval natural blue sapphire single
         
  x Pieces: 1 Sapphire x x Type: 100% Natural
 
  Color: Cornflower   Shape: Oval faceted
                 
  Weight: 2.38  Carats   Size: 9.1 x 6.9 mm
 
  Clarity: Very slightly included   Luster: Excellent
 
  Treatment: None (N)   Origin: Madagascar
Comment: Medium-blue.
Good cut,there is no window.   Refr. Index: 1.76-1.78   Hardness 9
Hand cut by one of our  Depth:4.8 mm.
masters lapidaries. Not treated in any way.  
 
Stone Price:  USD 4768.00

ref:SAboN238

     

    

This is a virtual certificate compiled from the lab data for the gemstone being examined. Clarity is based on magnification under a 10X corrected loupe. All gemology performed by GGGems. Jean & Alain Darbellay guaranteeing that this stone is 100% natural. Prices and availability are subject to change without notice
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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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