Black cabochon opal of 3.91 carats with GIA certificate of N - Lot 303

Lot 303
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Estimation :
300 - 500 EUR
Black cabochon opal of 3.91 carats with GIA certificate of N - Lot 303
Black cabochon opal of 3.91 carats with GIA certificate of November 19, 2020 indicating: surface treatment.
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