1 pcs 紫色, 藍色 坦桑石 - 9.41 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

ALGT 彩色宝石鉴定报告

IDENTIFICATION
鉴定

Species ......................................................................................................... Natural Zoisite
种类 ......................................................................................................... Natural Zoisite

Variety ..................................................................................................................... Tanzanite
品种................................................................................................................ Tanzanite

DESCRIPTION
描述

Shape & Cutting Style ................................................... Elongated Pear, Mixed Cut
形状与切割风格................................................... 长椭圆形，混合切工

Measurements ....................................................................... 21.01 x 9.88 x 7.08 mm
尺寸....................................................................... 21.01 x 9.88 x 7.08 毫米

Carat Weight ...................................................................................................... 9.41 Carat
克拉重量...................................................................................................... 9.41 克拉

Color ...................................................................................................... Vivid Purplish Blue
颜色...................................................................................................... 鲜艳的淡紫蓝

Transparency .................................................................................................. Transparent
透明度.................................................................................................. 透明

ADDITIONAL GRADING CHARACTERISTICS
附加等级特征

Color Quality Grade .......................................................................... Fine Color Quality
颜色质量等级.......................................................................... 细致色彩质量

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.
产地判定为基于显微镜检查、光谱特征及化学痕量元素分析的专家意见。

COMMENTS
备注

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.
目前没有科学方法可以确定该宝石是否经过改良。

Minor amount of clarity enhancement in fissures at the time of testing.
测试时裂缝中有少量净度增强。

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，此类增强在任何时候都可逆转。

07 February, 2026
2026年2月7日

64253926