FA-TISP024BY-001-003
Natural Gems Belgium Colored Stone Certification FA-TISP024BY-001-003
IDENTIFICATION : Natural yellowish green sphene - 1.43 ct - Octagon - unheated - sparkles A++
Species : Natural Titanite mineral
Variety : Green Sphene
DESCRIPTION
Shape & Cutting Style : Octagon, Mixed cut
Measurements : 10.1 x 4.0 x 3.0 mm
Total Carat Weight : 1.43 carat
Color : Yellowish green
Clarity : I1 (tiny chip on the down side)
Transparency : Transparent
Luster: Adamantine (difficult to polish)
Birefringence : 0.100-0.192.
Cleavage : Distinct 1 direction
Crystallography : Monoclinic
Dispersion : 0.051 (strong)
Hardness : 5- 5.5
Inclusions : feathers
Refractive index : 1.843-2.110
Specific gravity : 3.45-3.55
COMMENTS :
No indications of heating - No indications of treatment
Strong dispersion rate - A++ sparkles : sparkles in more the 3 colors minimum basically under direct light - adamantine luster
Tiny chip down side, only visiblewith magnification, not influencing value for setting in jewelry.
Personal Note From Natural Gems Belgium:
This 1.43 ct octagon cut gemstone sparkles yellowish greeen in normal daylight and exhibits multiple colors of sparkle in direct light. Its cut grade is good, symmetry is good, and polish is good, given its level of difficulty. The luster is also very and adamantine.
