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GENUINE BLUE SAPPHIRE                                   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 metamorphized marble.
7.53 cts. Genuine Oval blue sapphire single
  x Pieces: 1 Sapphire x x Type: Genuine
  Color: Dark Blue   Shape: Oval faceted
  Weight: 7.53 Carats   Size: 13.2 x 10.7 mm.
  Clarity: NFL   Luster: Excellent
  Treatment: Heated (H)   Origin: Madagascar
Comment: Dark blue.   Refr. Index: 1.76-1.78   Hardness 9
There is no window.
Hand cut by one of  Depth:6.4 mm.
our masters lapidaries.
Step cut.        

Stone Price:  USD 2179.00 



The SAbo753 do not shows any silky veil, it is eye clean, but at the loupe you can see an inclusion in the pavilion when you observe the stone up side down. This stone shows a commercial blue with greenish sparkles. 

The green sparkles are mixed with its intrinsic blue color and are visible on half of the stone when the sapphire is moving.

Let us say that the overall color of the stone is affected by a blue-green color. This sapphire is not a bi-color stone.

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- Scale determining the purity of a stone.  -
Flaw less Near flaw less Slightly included 1 Slightly included 2 Medium included 1
Medium included 2 Medium included 3 Very included 1 Very included 2 Highly included
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