Report · 26141d27-3d3c-4b50-b2d2-d6b874e32505

Gemstone Identification Report #013-2026

Green Sapphire, Corundum — —

Issued

02/03/2026

Olena Rybnikova, PhD · GIA

Origin

Tanzania

Species
Green Sapphire, Corundum
Specimen
—
Variety
Heart
Weight
0.490 ct
Dimensions
4.8 x 4.5 x 2.6
R.I.
1.762 - 1.770
D.R.
0.008
Pleo.
Strong bluish green to yellowish green
Fluor. LW
LW (365 nm) - inert
Fluor. SW
SW (254 nm) - inert
Chelsea
No reaction
Microscope
Clouds of brownish red rutile needles, white crystal inclusion, indicating no heat treatment or undetectable low-temperature treatment.
Treatment
Untreated
Origin
Tanzania
Confirmed by Raman spectroscopy.