FA-TOCH024GR-001-005
Natural Gems Belgium Colored Stone Certification FA-TOCH024GR-001-005
IDENTIFICATION : Natural Green Tourmaline - 1.76 ct - octagon - unheated
Species : Natural Tourmaline
Variety : Verdelite
DESCRIPTION
Shape & Cutting Style : Modified Octagon, Step Cut
Measurements : 6.5 x 6.3 x 4.9 mm
Carat Weight : 1.78 carat
Color : deep green
Clarity : comparable with VS1
Transparency : Transparent
Birefringence : 0.020
Crystallography : Hexagonal (trigonal)
Dispersion : 0.017
Luster : Vitreous
Hardness : 7
Refractive index : 1.603-1.820
Specific gravity : 3.39-3.41
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 all natural modified octagon, step cut, tapered, is a deep green gemstone, cith cut grade good to very good, has symmetry good (modified) has polis grade good to very good, and a clarity comparable to vs1, making it a gemstone with good vtreous luster, and nice clear deep color.
Reference for AAA grading:
Color grade is good
Cut grade is good to very good
Carat weight is good
Clarity is VS1
