編號 107927853

沒有保留價 - 6 pcs 藍色, 紫色 坦桑石 - 2.74 ct - Antwerp Laboratory for Gemstone Testing (ALGT)
編號 107927853

沒有保留價 - 6 pcs 藍色, 紫色 坦桑石 - 2.74 ct - Antwerp Laboratory for Gemstone Testing (ALGT)
ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species ......................................................................................................... Natural Zoisite
Variety ..................................................................................................................... Tanzanite
DESCRIPTION
Shape & Cutting Style ......................................................................... Oval, Mixed Cut
Total Carat Weight .......................................................................................... 2.74 Carat
Color ................................................................................................................. Purplish Blue
Transparency .................................................................................................. Transparent
ADDITIONAL GRADING CHARACTERISTICS
Origin ......................................................................................................................... Tanzania
Origin determination is an expert opinion based on microscopic examination, spectroscopic features and
chemical trace element analysis.
COMMENTS
Total 6 stones. Average carat weight: 0.45 ct.
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.
28 July, 2026
11970354
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