FA-TOPAO24WH-002-144

Natural Gems Belgium Colored Stone Certification FA-TOPAO24WH-002-144

IDENTIFICATION : Natural orangey brown Whiskey Topaz - 12.765 ct - Heart - AAA grade - irradiated

Species : Natural Topaz
Variety :  Brown topaz

DESCRIPTION

Shape & Cutting Style : Heart , Mixed Cut
Measurements : 13.3 x 13.3 x 9.8 mm
Carat Weight : 12.765 carat
Color : orangey brown
Clarity : comparable to VVS
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

Treatment: Irradiation

Personal Note From Natural Gems Belgium:

This Brown topaz could be commercially called Champaign topaz, Whiskey topaz or imperial topaz. Champaign topaz is more yellowish brown, Whiskey topaz is more Orangy brown, whilst an imperial topaz the yellow and orangy is more pronounced. The cut grade is good to very good, polish is good to very good, symmetry is good, and the luster is very good, making it a higher class gemstone.
Reference for AAA grading:
Color grade is good to very good, 
Cut grade is good to very good,
Carat weight is good,
Clarity is VVS (highest in Topaz)