Natural Green Chrome Tourmaline - 0.96 ct - oval - unheated - certified by NGB

Natural Green Chrome Tourmaline - 0.96 ct - oval - unheated ; color change under incadescent light and under chelsea filter with sunlight
This gem has a unique quality, in that its color changes when exposed to different types of light. Under incandescent light, the color changes, and under sunlight filtered through a Chelsea filter, the color changes again. This is a fascinating and rare gem that adds a special touch to any jewelry collection.

Natural Gems Belgium Colored Stone Certification  FA-TOCH024GR-001-002

IDENTIFICATION

Species : Natural Tourmaline
Variety : Chrome Tourmaline

DESCRIPTION

Shape & Cutting Style : oval, mixed cut
Measurements : 6.7 x 5.7 x 3.7 mm
Carat Weight : 0.96 carat
Color : Green (Color change to Orange by viewing under Chelsea filter with Sunlight) 
Clarity : comparable with I2
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;
Color change to Orange by viewing under Chelsea filter with Sunlight
Tiny chip on down side

FIND THE ONLINE CERTIFICATE HERE

for general impression take a look at the pictures

All items are sent insured with track and trace regardless of value