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- Aug 17, 2009
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Hi there I have just graded this star sapphire and was told that it is of quite a good grade, however I do see silk on the stone, it does not seem clean and clear to me. Do take a look at the report and let me have you views on this star sapphire grade and approximate cost in the market? tks
Natural White Star Sapphire
(Corundum)
3.79carats
10.69X8.69X4.11mm
Oval, Cabochon
Translucent
Refractive Index 1.76 (spot reading)
Specific Gravity 3.99
Fingerprint, silk and growth zoning
Other test: Pleochroism and fluorescence
Comments: No indications of thermal enhancement. This stone display an asterism. Gemological testing revealed characteristics consistent with those of sapphire originating from Sri lanka.
Nan Yang Gemological Institute
Natural White Star Sapphire
(Corundum)
3.79carats
10.69X8.69X4.11mm
Oval, Cabochon
Translucent
Refractive Index 1.76 (spot reading)
Specific Gravity 3.99
Fingerprint, silk and growth zoning
Other test: Pleochroism and fluorescence
Comments: No indications of thermal enhancement. This stone display an asterism. Gemological testing revealed characteristics consistent with those of sapphire originating from Sri lanka.
Nan Yang Gemological Institute