10 pcs 藍色, 紫色 坦桑石 - 4.42 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

ALGT 彩色宝石识别报告

IDENTIFICATION
Species ......................................................................................................... Natural Zoisite
Variety ..................................................................................................................... Tanzanite
DESCRIPTION
Shape & Cutting Style ......................................................................... Oval, Mixed Cut
Total Carat Weight .......................................................................................... 4.42 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 10 stones. Average carat weight: 0.44 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.
24 July, 2026
17154477