Report · 95cdc5a8-fcb8-4c1e-b824-806a108abdfd

Gemstone Identification Report #010-2026

Sapphire, Corundum — —

Issued

02/03/2026

Olena Rybnikova, PhD · GIA

Origin

Tanzania

Species
Sapphire, Corundum
Specimen
—
Variety
Oval
Weight
0.840 ct
Dimensions
6.0 x 4.8 x 3.2
R.I.
1.762 - 1.770
D.R.
0.008
Pleo.
Strong blue to yellowish green.
Fluor. LW
LW (365 nm) - inert
Fluor. SW
SW (254 nm) - inert
Chelsea
No reaction
Microscope
Fingerprints with untacked two-phase inclusions, brownish-red rutile inclusions untacked, indicating no heat treatment or undetectable low-temperature treatment.
Treatment
Untreated
Origin
Tanzania
Confirmed by Raman spectroscopy.