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A large natural orange topaz loose gemstone, weighing an imp...

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A large natural orange topaz loose gemstone, weighing an impressive 28.50 carats, displaying an attractive yellowish-orange colour, of cushion shape with brilliant and modified step cut faceting, measuring 18.55 x 13.85 x 11.84mm. Transparent with good lustre, accompanied by an ICA GemLab identification report confirming the gemstone as natural topaz. The report notes that topaz is commonly heated or irradiated to enhance its colour and that the colour's natural origin cannot currently be determined. Complete with original gemmological certificate and protective wallet.

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Time, Location
24 Oct 2026
UK, Newtown, Powys
Auction House

[ translate ]

A large natural orange topaz loose gemstone, weighing an impressive 28.50 carats, displaying an attractive yellowish-orange colour, of cushion shape with brilliant and modified step cut faceting, measuring 18.55 x 13.85 x 11.84mm. Transparent with good lustre, accompanied by an ICA GemLab identification report confirming the gemstone as natural topaz. The report notes that topaz is commonly heated or irradiated to enhance its colour and that the colour's natural origin cannot currently be determined. Complete with original gemmological certificate and protective wallet.

Estimate
Unlock
Time, Location
24 Oct 2026
UK, Newtown, Powys
Auction House