FA-TISP024BY-002-206

Natural Gems Belgium Colored Stone Certification FA-TISP024BY-002-206

IDENTIFICATION : Natural yellow shpene - 0.455 ct - round - unheated

Species : Natural Titanite mineral
Variety : Sphene

DESCRIPTION

Shape & Cutting Style : round
Measurements : 4.7 x 4.7 x 2.8 mm
Total Carat Weight : 0.455 carat
Color : deep yellow  
Clarity : I1
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
Refractive index : 1.843-2.110
Specific gravity : 3.45-3.55

COMMENTS :

No indications of heating - No indications of treatment
Strong dispersion rate 

Personal Note From Natural Gems Belgium:

This round cut gemstone its cut grade is good, symmetry is fair, and polish is fair. The luster is good and adamantine good.