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 COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species ......................................................................................................... Natural Zoisite
Variety ..................................................................................................................... Tanzanite
DESCRIPTION
Shape & Cutting Style ................................................. 方形枕形，混合切工
Measurements .................................................................... 11.98 x 11.84 x 7.37 mm
Carat Weight ...................................................................................................... 8.43 Carat
Color ...................................................................................... 鲜艳/深蓝（偏紫）
Transparency .................................................................................................. 透明
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade .......................................................................... 优良颜色质量
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.
Insignificant 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
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