No. 103606316

1 pcs Blue Topaz - 33.19 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - ロンドンブルー
No. 103606316

1 pcs Blue Topaz - 33.19 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - ロンドンブルー
ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species .......................................................................................................... Natural Topaz
Variety ................................................................................................................. Blue Topaz
DESCRIPTION
Shape & Cutting Style ......................................................................... Pear, Mixed Cut
Measurements .................................................................. 21.85 x 18.53 x 11.58 mm
Carat Weight ................................................................................................... 33.19 Carat
Color ....................................................................................................................... Deep Blue
Transparency .................................................................................................. Transparent
ADDITIONAL GRADING CHARACTERISTICS
Trade Color Name ....................................................................................... London Blue
COMMENTS
Blue topaz is commonly enhanced by irradiation and/or heating to improve
its color. There is currently no scientific method available to determine
whether this gemstone has been enhanced or not.
12 March, 2026
51646877
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