Report · 6e9a19a6-bfb2-4410-9bc3-9eaf2944741b

Gemstone Identification Report #021-2026

Sapphire, Corundum — —

Issued

03/03/2026

Olena Rybnikova, PhD · GIA

Origin

Madagascar

Species
Sapphire, Corundum
Specimen
—
Variety
Oval
Weight
0.330 ct
Dimensions
5.0 x 4.0 x 1.9
R.I.
1.760 - 1.768
D.R.
0.008
Pleo.
Strong blue to yellowish green.
Fluor. LW
LW (365 nm) - moderate red
Fluor. SW
SW (254 nm) - inert
Chelsea
No reaction
Microscope
Straight blue color zoning, colorless crystal inclusions.
Treatment
Diffusion
Origin
Madagascar
Confirmed by Raman spectroscopy.