1 pcs White Opal - 10.54 ct - Antwerp Laboratory for Gemstone Testing (ALGT)
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Natural opal, single stone, 10.54 carats, white with vivid play of colour, transparent, square cushion cabochon with no indications of treatment per ALGT report.
AI-assisted summary
Description from the seller
ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species .............................................................................................................. Natural Opal
Variety ............................................................................................................... Crystal Opal
DESCRIPTION
Shape & Cutting Style ................................................. Square Cushion, Cabochon
Measurements .................................................................... 14.31 x 14.18 x 7.88 mm
Carat Weight ................................................................................................... 10.54 Carat
Color ................................................................................ White + Play of Colors (Vivid)
Transparency .................................................................................................. Transparent
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade .......................................................................... Fine Color Quality
Optical Effect .................................................................................................. Opaliscence
COMMENTS
No indications of treatment.
31 October, 2025
29726984
ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species .............................................................................................................. Natural Opal
Variety ............................................................................................................... Crystal Opal
DESCRIPTION
Shape & Cutting Style ................................................. Square Cushion, Cabochon
Measurements .................................................................... 14.31 x 14.18 x 7.88 mm
Carat Weight ................................................................................................... 10.54 Carat
Color ................................................................................ White + Play of Colors (Vivid)
Transparency .................................................................................................. Transparent
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade .......................................................................... Fine Color Quality
Optical Effect .................................................................................................. Opaliscence
COMMENTS
No indications of treatment.
31 October, 2025
29726984
Details
Nr of stones
1
Gemstone type
Opal
Total carat weight
10.54
Gemstone colour
White
Optical effect
Play of colour
Transparency
Transparent
Treatment
No evidence of treatment
Laboratory Report
Antwerp Laboratory for Gemstone Testing (ALGT)
Sealed by laboratory
No
Shape
Cushion
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