Alberto Fidalgo

Coloured Gemstones Auction

ALGT Colored Stone Identification Report n. 41832972 (25 September, 2026)
Natural Opal
Crystal Opal
Oval Shape, Cabochon Cut
Ct. 4.95
16.01 x 10.55 x 6.89
Orange + Play of Colors (Vivid)
Transparent
Opaliscence
Fine Color Quality
No Indications of Treatment

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1 pcs  Orange, Multicolour Opal  - 4.95 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Fine Color Quality

No evidence of treatment-  Lab report: 41832972

Italy

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Private collector. Offers selected colored gems.

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Natural orange and multicolour opal, 1 stone, total 4.95 ct, oval cabochon with transparent opalescence and no evidence of treatment, ALGT report 41832972.

1 pcs Orange, Multicolour Opal - 4.95 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Fine Color Quality

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Natural orange and multicolour opal, 1 stone, total 4.95 ct, oval cabochon with transparent opalescence and no evidence of treatment, ALGT report 41832972.

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