3.17 Ct Natural Black Flashing Fire "Midnight Spark" Opal Oval CabGems Auction4.7(439)$1(1 bid)May 01, 2026
Multi Color Sparkling Matrix Boulder Opal 3.35 Ct. Free Form Cabochon Shape 10.2 x 8.7 Mm GemstoneTreasure of Gems & Jewelry4.4(224)$11 day Left
7.62Ct Winton Boulder Opal Polished - Australian Opal - Oval Cabochon, 875AKsmith Heritage Auctioneers4.3(46)$5Apr 25, 2026
3.08 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 12.8x9.3mm, 2XMThousandPlanet4.5(256)$513 hrs Left
*1.91Ct Welo Black Opal Polished - Ethiopian OpalKsmith Heritage Auctioneers4.3(46)See Sold PriceJun 29, 2025
