FA-TOCH024GR-001-004
Natural Gems Belgium Colored Stone Certification FA-TOCH024GR-001-004
IDENTIFICATION : Natural Yellowish green Tourmaline - 1.82 ct - round - unheated
Species : Natural Tourmaline
Variety : Verdelite
DESCRIPTION
Shape & Cutting Style : Round, brilliant cut
Measurements : 7.3 x 7.3 x 5.0 mm
Carat Weight : 1.82 carat
Color : yellowish olive green
Clarity : comparable with SI1
Transparency : Transparent
Birefringence : 0.020
Crystallography : Hexagonal (trigonal)
Dispersion : 0.017
Luster : Vitreous
Hardness : 7
Refractive index : 1.603-1.820 checked = in margin
Specific gravity : 3.39-3.41 checked = in margin
COMMENTS :
No indications of heating, no indications of any other treatment;
Green Tourmaline is often referred to as verdelite
Personal Note From Natural Gems Belgium:
This natural green tourmaline is all natural, unheated, is a rounds shaped brilliant cut gemstone, has cut grade good, polish fair to good, symmetry fair to good, and a nice luster.