FA-TISP026BY-003-230

Natural sphene - 0.420 ct - round - unheated - high fire

Natural Gems Belgium Colored Stone Certification FA-TISP026BY-003-230

IDENTIFICATION

Species : Natural Titanite mineral
Variety : Sphene

DESCRIPTION

Shape & Cutting Style : round brilliant
Measurements : 4.4 x 4.4 x 3.0 mm
Total Carat Weight : 0.420 carat
Color : brownish yellow  
Clarity : I
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:

Cut : Good
Color : good to very good
Carat : Jewelry size
Clarity : good 
Symmetry : very good