1.38ct Oval Cut Natural Sapphire

1.38ct Oval Cut Natural Sapphire

Gemological report included

Mineral Corundum

Chem. Composition: Al2O3

Specific Gravity 4.00

Hardness 9

Refractive Index 1.762 – 1.770

Birefringence 0.008 – 0.010

Fluorescence Orangey red

Pleochroism vB-gB

Optic character Doubly refractive

Optic dispersion 0.018