FA-IOLI026BV-003-166

Natural Iolite - 0.765 ct - round - unheated - bluish violet- AKA the water-sapphire

Natural Gems Belgium Colored Stone Certification FA-IOLI026BV-003-166

IDENTIFICATION

Species : Natural Cordierite
Variety : Iolite

DESCRIPTION

Shape & Cutting Style : Round, Brilliant Cut
Measurements : 6.0 x 6.1 x 3.8 mm
Carat Weight : 0.765 Carat
Color : violet (bluish)
Clarity : comparable to SI
Transparency : Transparant

Birefringence : 0.005-0.018
Crystallography : Orthorhombic
Dispersion : 0.017
Luster : Vitreous
Hardness : 7.5
Refractive index : 1.522-1.578
Specific gravity : 2.53-2.78

COMMENTS :

No indications of heating, no indications of any other treatment

Personal Note From Natural Gems Belgium:

Color : good to very good
Clarity : good to very good
Carat: jewelry size
Cut  : very good
Symmetry : good