Report · 4f5b5047-c2e1-4f2c-bec3-fced2f295407

Gemstone Identification Report #019-2026

Sapphire, Corundum — —

Issued

03/03/2026

Olena Rybnikova, PhD · GIA

Origin

Sri Lanka

Species
Sapphire, Corundum
Specimen
—
Variety
Oval
Weight
0.670 ct
Dimensions
6.0 x 4.0 x 2.8
R.I.
1.761 - 1.769
D.R.
0.008
Pleo.
Strong violet blue to greenish blue
Fluor. LW
LW (365 nm) - inert
Fluor. SW
SW (254 nm) - inert
Chelsea
No reaction
Microscope
Crystal inclusion with disc-like tension fractures, ''snowball'' inclusions, indicating heat treatment.
Treatment
Heated
Origin
Sri Lanka
Confirmed by Raman spectroscopy.