8.68Ct Natural Ethiopian Black Opal - 20.3x16.6x5.7 mm , 572CKsmith Heritage Auctioneers4.3(48)$1005 days Left
Natural Boulder Opal Multi-Color Gemstones 21.40 Ct. Flashing Free Form CabochonTreasure of Gems & Jewelry4.5(264)$16 days Left
14.60ct Natural Australian Queensland Matrix Boulder Opal Cabochon, 75ATThousandPlanet4.5(309)$101 day Left
28.40ct Natural Australian Queensland Boulder Opal Sliced Slab Cutting Rough, 18AXThousandPlanet4.5(309)$101 day Left
