8.07Ct Natural Ethiopian Black Opal - 18.3x12.9x6.8 mm , 597CKsmith Heritage Auctioneers4.3(48)$1001 day Left
*17.06Ct Welo Opal Polished - Ethiopian Opal , 439CKsmith Heritage Auctioneers4.3(48)$240(1 bid)1 day Left
Natural Boulder Opal Multi-Color Gemstones 21.40 Ct. Flashing Free Form CabochonTreasure of Gems & Jewelry4.5(263)$1Aug 30, 2026
