1 pcs 藍色 坦桑石 - 9.99 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species ......................................................................................................... 天然透闪石
Variety ..................................................................................................................... 坦桑石
DESCRIPTION
Shape & Cutting Style ................................................ Modified Octagon, Step Cut
Measurements .................................................................... 11.81 x 10.24 x 8.53 mm
Carat Weight ...................................................................................................... 9.99 Carat
Color ..................................................................................... 强烈/鲜明的紫蓝色
Transparency ....................................................................................... 半透明
ADDITIONAL GRADING CHARACTERISTICS
Origin ......................................................................................................................... 坦桑尼亚
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.
Moderate amount of clarity enhancement in fissures.
Clarity enhancement has become a common practice in trade for many gemstones. This enhancement is reversible at any time.
17 November, 2025
95638353