FA-TOPAO24LB-001-107

Natural Gems Belgium Colored Stone Certification FA-TOPAO24LB-001-107

IDENTIFICATION : Natural light blue Topaz - 15.31 ct -oval - untreated 

Species : Natural Topaz
Variety :  blue topaz

DESCRIPTION

Shape & Cutting Style : Oval , Mixed Cut
Measurements : 14.8 x 12.7 x 10.4 mm
Carat Weight : 15.31 carat
Color :  light blue
Clarity : comparable to SI2
Transparency : Transparent
origin : Brazil

Binefringence: 0.008-0.011
Crystallography : Orthorhombic
Hardness : 8
Luster : Vitreous
Refractive Index : 1.607-1.649 (1631=Brazil)
Specific Gravity : 3.50-3.57 ( 352-353)

COMMENTS

No indication of heating no indication of other treatment
(this blue topaz is not irradiated what is extremely rare for blue topaz gemstones)

Personal Note From Natural Gems Belgium:

This blue topas has good cut grade, good polish, fair color, and good symmetry, ct weight is good to very good, the clarity is good