Report · 510f9b34-6d6c-4268-8856-2523c65d8520

Gemstone Identification Report #009-2026

Sapphire, Corundum — —

Issued

02/03/2026

Olena Rybnikova, PhD · GIA

Origin

Tanzania

Species
Sapphire, Corundum
Specimen
—
Variety
Pear
Weight
0.770 ct
Dimensions
7.2 x 5.0 x 2.8
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
Surface-reaching fracture with iron oxides, indicating no heating or undetectable low-temperature treatment.
Treatment
Untreated
Origin
Tanzania
Confirmed by Raman spectroscopy.