FA-TISP024BY-001-001

Natural Gems Belgium Colored Stone Certification FA-TISP024BY-001-001

IDENTIFICATION : Natural brownish yellow shpene - 0.50 ct - round - unheated - sparkles A+

Species : Natural Titanite mineral
Variety : Yellow Sphene

DESCRIPTION

Shape & Cutting Style : Round Brilliant, Mixed cut
Measurements : 4.6 x 4.8 x 3.0 mm
Total Carat Weight : 0.50 carat
Color : brownish yellow  
Clarity : I2
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 checked
Specific gravity : 3.45-3.55 checked

COMMENTS :

No indications of heating - No indications of treatment
Strong dispersion rate - A+ sparkles : sparkles in two colors minimum basically under direct light - adamantine luster

Personal Note From Natural Gems Belgium:

This round brilliant cut gemstone is a gemstone with the sparkles light visible in normal daylight, and 3 shades of sparkle colors present in direct light.
is vut grade is fair to good, symmetry is poor to fair, polish is good considering difficulty of polish, luster is good and adamantine