瑞士-【深蓝色】 黄宝石 - 20.85 ct
编号 82562483
1 pcs [伦敦](深蓝) 黄宝石 - 17.90 ct
编号 82562483
1 pcs [伦敦](深蓝) 黄宝石 - 17.90 ct
Algt Colored Stone Identification Report # 19306951
Report Date: 16 January, 2024
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Identification
Species .......................................................................................................... Natural Topaz
Variety .................................................................................................................. Blue Topaz
Description
Shape & Cutting Style ......................................................................... Oval, Mixed Cut
Measurements .................................................................... 21.02 X 13.19 X 8.84 Mm
Carat Weight ................................................................................................... 17.90 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.