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Ghene Menezes

ALGT COLORED STONE IDENTIFICATION REPORT
IDENTIFICATION
Species .............................................................................................................. Natural Opal
Variety ............................................................................................................... Crystal Opal
DESCRIPTION
Shape & Cutting Style ..................................................... Modified Pear, Mixed Cut
Measurements .................................................................... 19.85 x 16.26 x 9.12 mm
Carat Weight ................................................................................................... 11.56 Carat
Color ........................................................ White (Yellowish) + Play of Colors (Vivid)
Transparency ................................................................................................... Translucent
ADDITIONAL GRADING CHARACTERISTICS
Optical Effect .................................................................................................. Opaliscence
Origin .......................................................................................................................... Ethiopia
Origin determination is an expert opinion based on microscopic examination, spectroscopic features and
chemical trace element analysis.
COMMENTS
No indications of treatment.
20 July, 2025
33768564

No evidence of treatment

1 pcs  White Opal  - 11.56 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

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Country of origin

No origin given

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Certification

International Gemological Institute (IGI)

International Colored Gemstone Association (ICA GemLab)

Antwerp Laboratory for Gemstone Testing (ALGT)

Instituto Gemólogico Español (IGE)

Gemological Institute of America (GIA)

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No laboratory report

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Colour

Blue

Green

Yellow

Pink

Purple

Orange

Violet

Brown

White

Multicolour

Grey

Bi-colour

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Oval

Mixed cut

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Radiant

Clarity

Eye clean

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Moderate

Loupe clean

Heavy

Severe

Treatment

Heat treatment

No heat treatment

Commonly heated with no evidence of treatment

Oiling

Not specified in the report

Commonly irradiated with no evidence of treatment

Clarity enhancement

Irradiation

Fracture healing / filling

Gemstone transparency

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Pearl luster

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Optical effect (gemstones)

Colour change

Play of colour

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1 pcs White Opal - 11.56 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

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