8.68Ct Natural Ethiopian Black Opal - 20.3x16.6x5.7 mm , 572CKsmith Heritage Auctioneers4.3(48)$1006 days Left
Natural Boulder Opal Multi-Color Gemstones 21.40 Ct. Flashing Free Form CabochonTreasure of Gems & Jewelry4.5(263)$1Aug 30, 2026
27.75ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 58AYThousandPlanet4.5(309)$1013 hrs Left
58.98ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 73AXThousandPlanet4.5(309)$1013 hrs Left
43.72ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 84YLLazo Heritage4.4(22)$1015 hrs Left
