FA-TISP024BY-002-203

Natural Gems Belgium Colored Stone Certification FA-TISP024BY-002-203

IDENTIFICATION : Natural yellow shpene - 0.824 ct - cushion - unheated

Species : Natural Titanite mineral
Variety : Sphene

DESCRIPTION

Shape & Cutting Style : cushion, mixed cut
Measurements : 6.3 x 5.6 x 3.1 mm
Total Carat Weight : 0.824 carat
Color : brownish orangey yellow  
Clarity : I3
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 
inequalities in surface due to polish (under magnification)

Personal Note From Natural Gems Belgium:

This oval cut gemstone its cut grade is good, symmetry is good, and polish is poor. The luster is good and adamantine good.