FA-TOCH024GR-001-006
Natural Gems Belgium Colored Stone Certification FA-TOCH024GR-001-006
IDENTIFICATION : Natural Green Tourmaline - 4.14 ct - round - unheated
Species : Natural Tourmaline
Variety : Green Tourmaline (verdelite)
DESCRIPTION
Shape & Cutting Style : Round, Brilliant Cut
Measurements : 10.0 x 9.2 x 6.7 mm
Carat Weight : 4.14 carat
Color : deep olive green
Clarity : comparable with S1
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 all natural round, brilliant cut tourmaline is a deep green gemstone, with cut grade good, has symmetry good has polish grade good to very good, and a clarity comparable to SI1, making it a gemstone with good vitreous luster, and nice clear green color.
Reference for AAA grading:
Color grade is good
Cut grade is good
Carat weight is very good
Clarity is VS1
