No. 100126759

Sold
No reserve price - 1 pcs Blue Topaz - 29.99 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Swiss Blue
Final bid
€ 140
4 days ago

No reserve price - 1 pcs Blue Topaz - 29.99 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Swiss Blue

Alberto Fidalgo
Expert

Selected by Alberto Fidalgo
ALGT COLORED STONE IDENTIFICATION REPORT IDENTIFICATION Species .......................................................................................................... Natural Topaz Variety .................................................................................................................. Blue Topaz DESCRIPTION Shape & Cutting Style ......................................................................... Pear, Mixed Cut Measurements .................................................................. 19.66 x 16.21 x 12.47 mm Carat Weight ................................................................................................... 29.99 Carat Color ................................................................................................................... Intense Blue Transparency .................................................................................................. Transparent ADDITIONAL GRADING CHARACTERISTICS Trade Color Name ............................................................................................ Swiss Blue COMMENTS Blue topaz is commonly enhanced by irradiation and/or heating to improve its color. There is currently no scientific method available to determine whether this gemstone has been enhanced or not. 18 November, 2025 24114042

No. 100126759

Sold
No reserve price - 1 pcs Blue Topaz - 29.99 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Swiss Blue

No reserve price - 1 pcs Blue Topaz - 29.99 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Swiss Blue

ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species .......................................................................................................... Natural Topaz
Variety .................................................................................................................. Blue Topaz
DESCRIPTION
Shape & Cutting Style ......................................................................... Pear, Mixed Cut
Measurements .................................................................. 19.66 x 16.21 x 12.47 mm
Carat Weight ................................................................................................... 29.99 Carat
Color ................................................................................................................... Intense Blue
Transparency .................................................................................................. Transparent
ADDITIONAL GRADING CHARACTERISTICS
Trade Color Name ............................................................................................ Swiss Blue
COMMENTS
Blue topaz is commonly enhanced by irradiation and/or heating to improve
its color. There is currently no scientific method available to determine
whether this gemstone has been enhanced or not.
18 November, 2025
24114042

Final bid
€ 140
Alberto Fidalgo
Expert
Selected by Alberto Fidalgo
Retail Estimate  € 1,000 - € 1,300

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