1 pcs 紫色, 蓝色 坦桑石 - 8.91 ct - 安特卫普宝石检测实验室（ALGT）
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一颗椭圆形混合切工的坦桑石，总重8.91克拉，透明，鲜艳的紫蓝色，产自坦桑尼亚，通常经过加热且无处理证据， ALGT 报告编号 37887387。
AI辅助摘要
卖家的描述
ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species ......................................................................................................... Natural Zoisite
Variety ..................................................................................................................... Tanzanite
DESCRIPTION
Shape & Cutting Style ......................................................................... Oval, Mixed Cut
Measurements .................................................................... 14.51 x 11.39 x 7.70 mm
Carat Weight ...................................................................................................... 8.91 Carat
Color ...................................................................................................... Vivid Purplish Blue
Transparency .................................................................................................. Transparent
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade .......................................................................... Fine Color Quality
Origin ......................................................................................................................... Tanzania
Origin determination is an expert opinion based on microscopic examination, spectroscopic features and
chemical trace element analysis.
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 clarity enhancement in fissures at the time of testing.
Clarity enhancement has become a common practice in trade for many
gemstones. This enhancement is reversible at any time.
07 February, 2026
37887387
ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species ......................................................................................................... Natural Zoisite
Variety ..................................................................................................................... Tanzanite
DESCRIPTION
Shape & Cutting Style ......................................................................... Oval, Mixed Cut
Measurements .................................................................... 14.51 x 11.39 x 7.70 mm
Carat Weight ...................................................................................................... 8.91 Carat
Color ...................................................................................................... Vivid Purplish Blue
Transparency .................................................................................................. Transparent
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade .......................................................................... Fine Color Quality
Origin ......................................................................................................................... Tanzania
Origin determination is an expert opinion based on microscopic examination, spectroscopic features and
chemical trace element analysis.
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 clarity enhancement in fissures at the time of testing.
Clarity enhancement has become a common practice in trade for many
gemstones. This enhancement is reversible at any time.
07 February, 2026
37887387
详细资料
Nr of stones
1
实验室报告编号
37887387
Gemstone type
坦桑石
复数宝石的总重量（克拉）
8,91
颜色
紫色, 蓝色
宝石透明度
透明的
处理
普通热处理，无特殊处理特征
鉴定证书
安特卫普宝石检测实验室（ALGT）
密封/不密封
不是
形状
椭圆形
切割方式
混合切割
