1 pcs Lila, Blau Tansanit - 8.43 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

ALGT FARBIGER STEIN IDENTIFIZIERUNGSBERICHT
IDENTIFICATION
Species ......................................................................................................... Natural Zoisite
Variety ..................................................................................................................... Tanzanite
DESCRIPTION
Shape & Cutting Style ................................................. Quadrat-Kissen-Schliff, Gemischter Schliff
Measurements .................................................................... 11.98 x 11.84 x 7.37 mm
Carat Weight ...................................................................................................... 8.43 Carat
Color ...................................................................................... Vivid/Deep Blue (Purplish)
Transparency .................................................................................................. Transparent
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade .......................................................................... Fine Color Quality
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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