编号 92658373

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1 pcs 蓝色 坦桑石 - 19.84 ct - 安特卫普宝石检测实验室（ALGT）
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1 pcs 蓝色 坦桑石 - 19.84 ct - 安特卫普宝石检测实验室（ALGT）

Purificacion Aquino Garcia

由Purificacion Aquino Garcia精选
09 July, 2024 ALGT Report Number 88408230 IDENTIFICATION Species ................................................................................ Natural Zoisite Variety ............................................................................................ Tanzanite DESCRIPTION Shape & Cutting Style ............................................... Oval, Mixed Cut Measurements ............................................ 17.67 x 13.80 x 9.93 mm Carat Weight ........................................................................... 19.84 Carat Color .............................................................. Vivid/Deep Blue (Purplish) Transparency ......................................................................... Transparent ADDITIONAL GRADING CHARACTERISTICS Color Quality Grade ................................................. Fine Color Quality Suggested Origin ....................................................................... Tanzania COMMENTS Tanzanite is commonly heated at low temperature to improve its color. There is currently no scientific method available to determine whether this gemstone has been enhanced or not. Minor amount of oil in fissures. Oiling has become common practice in trade for many gemstones. This enhancement is reversible at any time.

编号 92658373

已不存在
1 pcs 蓝色 坦桑石 - 19.84 ct - 安特卫普宝石检测实验室（ALGT）

1 pcs 蓝色 坦桑石 - 19.84 ct - 安特卫普宝石检测实验室（ALGT）

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09 July, 2024
ALGT Report Number 88408230
IDENTIFICATION
Species ................................................................................ Natural Zoisite
Variety ............................................................................................ Tanzanite
DESCRIPTION
Shape & Cutting Style ............................................... Oval, Mixed Cut
Measurements ............................................ 17.67 x 13.80 x 9.93 mm
Carat Weight ........................................................................... 19.84 Carat
Color .............................................................. Vivid/Deep Blue (Purplish)
Transparency ......................................................................... Transparent
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade ................................................. Fine Color Quality
Suggested Origin ....................................................................... Tanzania
COMMENTS
Tanzanite is commonly heated at low temperature to
improve its color. There is currently no scientific method
available to determine whether this gemstone has been
enhanced or not.
Minor amount of oil in fissures.
Oiling has become common practice in trade for many
gemstones. This enhancement is reversible at any time.

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