没有保留价 - 1 pcs 紫色, 蓝色 坦桑石 - 8.43 ct - 安特卫普宝石检测实验室（ALGT）

ALGT 彩色宝石鉴定报告
鉴定
Species ......................................................................................................... Natural Zoisite
品种/种类 ................................................ 自然透闪石
Variety ..................................................................................................................... Tanzanite
变种 .......................................................... 坦桑石
DESCRIPTION
Shape & Cutting Style ................................................. Square Cushion, Mixed Cut
形状与切割风格 ........................................ 方垫形，混合切割
Measurements .................................................................... 11.98 x 11.84 x 7.37 mm
尺寸 .................................................................... 11.98 x 11.84 x 7.37 mm
Carat Weight ...................................................................................................... 8.43 Carat
克拉重量 ...................................................................................................... 8.43 克拉
Color ...................................................................................... Vivid/Deep Blue (Purplish)
颜色 ...................................................................................... 鲜明/深蓝色（偏紫）
Transparency .................................................................................................. Transparent
透明度 .................................................................................................. 透明
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade .......................................................................... Fine Color Quality
颜色质量等级 .......................................................................... 优良颜色质量
Origin ......................................................................................................................... Tanzania
产地 ................................................................................................................. 坦桑尼亚
Origin determination is an expert opinion based on microscopic examination, spectroscopic features and
chemical trace element analysis.
产地判定是基于显微观察、分光特征及化学痕量元素分析的专家意见。
COMMENTS
Tanzanite is commonly heated at low temperature to improve its color.
坦桑石通常在低温下加热以改善颜色。
There is currently no scientific method available to determine whether this
gemstone has been enhanced or not.
目前尚无科学方法能够判定该宝石是否经过改良。
Insignificant amount of clarity enhancement in fissures at the time of
testing.
测试时裂缝处的净度增强量微不足道。
Clarity enhancement has become a common practice in trade for many
gemstones. This enhancement is reversible at any time.
净度增强已成为许多宝石贸易中的常见做法，此类增强是可逆的，随时可撤销。
07 February, 2026
2026年2月7日
25813759