Report · 4b44cbe5-3075-4ca7-812f-e1cd364cfcf3
Gemstone Identification Report #108-2026
Sapphire, Corundum — —
Issued
11/06/2026
Olena Rybnikova, PhD · GIA
Origin
Sri Lanka
Species
Sapphire, Corundum
Specimen
—
Variety
Pear
Weight
0.160 ct
Dimensions
4.0 x 3.0 x 1.8 mm
R.I.
1.760 - 1.768
S.G.
4.00
D.R.
0.008
Pleo.
Weak blue to greenish blue
Fluor. LW
Inert
Fluor. SW
Inert
Chelsea
Inert
Microscope
Straight color zoning.
Treatment
Heat treatment COMMENTS: Thermal enhancement (heat treatment) of corundum is a widely accepted and commercially established standard practice within the international gem trade, provided it is fully and transparently disclosed to all parties throughout the chain of custody.
Origin
Sri Lanka
Report · 4b44cbe5-3075-4ca7-812f-e1cd364cfcf3
Gemstone Identification Report #108-2026
Sapphire, Corundum — —
Issued
11/06/2026
Olena Rybnikova, PhD · GIA
Origin
Sri Lanka
Species
Sapphire, Corundum
Specimen
—
Variety
Pear
Weight
0.160 ct
Dimensions
4.0 x 3.0 x 1.8 mm
R.I.
1.760 - 1.768
S.G.
4.00
D.R.
0.008
Pleo.
Weak blue to greenish blue
Fluor. LW
Inert
Fluor. SW
Inert
Chelsea
Inert
Microscope
Straight color zoning.
Treatment
Heat treatment COMMENTS: Thermal enhancement (heat treatment) of corundum is a widely accepted and commercially established standard practice within the international gem trade, provided it is fully and transparently disclosed to all parties throughout the chain of custody.
Origin
Sri Lanka
No description provided.