Report · 03081b95-c918-4723-b190-9e13fc51d6d4
Gemstone Identification Report #082-2026
Corundum — Ceylon
Issued
07/04/2026
Olena Rybnikova, PhD · GIA
Origin
Sri Lanka
Species
Corundum
Specimen
Variety
Oval
Weight
0.770 ct
Dimensions
6.14 x 5.09 x 3.15
R.I.
1.760 - 1.768
D.R.
0.009
Pleo.
Moderate violetish blue to light greenish blue
Fluor. LW
LW (365 nm) - inert
Fluor. SW
SW (254 nm) - inert
Chelsea
No reaction
Microscope
A minute crystal inclusion exhibiting a characteristic discoid halo fracture pattern — consistent with so-called 'snowball'-type inclusions — in which the surrounding partially healed discoid fractures provide evidence of exposure to high-temperature thermal enhancement.
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 · 03081b95-c918-4723-b190-9e13fc51d6d4
Gemstone Identification Report #082-2026
Corundum — Ceylon
Issued
07/04/2026
Olena Rybnikova, PhD · GIA
Origin
Sri Lanka
Species
Corundum
Specimen
Variety
Oval
Weight
0.770 ct
Dimensions
6.14 x 5.09 x 3.15
R.I.
1.760 - 1.768
D.R.
0.009
Pleo.
Moderate violetish blue to light greenish blue
Fluor. LW
LW (365 nm) - inert
Fluor. SW
SW (254 nm) - inert
Chelsea
No reaction
Microscope
A minute crystal inclusion exhibiting a characteristic discoid halo fracture pattern — consistent with so-called 'snowball'-type inclusions — in which the surrounding partially healed discoid fractures provide evidence of exposure to high-temperature thermal enhancement.
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.