4.90 Carats Natural Black Fire Opal Loose Stone ? Vibrant Flashing Colors - 14X11X7.5 mmFantasy Jewelry3.6(149)$983 days Left
Natural Multi Color Ridge Matrix Boulder Opal Gemstones 2.80 Ct. Free Form Cabochon 11.8 x 7 Mm.Treasure of Gems & Jewelry4.4(250)$8Aug 10, 2026
5.01 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 12.2x9.6mm, 8XMLazo Heritage4.3(16)$251230 Lots Away
3.82 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 12.8x9.5mm, 7XMLazo Heritage4.3(16)$251520 Lots Away
12.26ct Natural Australian Queensland Matrix Boulder Opal Cabochon, 70ATThousandPlanet4.5(299)$102 days Left
30.45ct Natural Australian Queensland Matrix Boulder Opal Cabochon, 7AV, 7AVThousandPlanet4.5(299)$1018 hrs Left
2.35Ct Welo Black Opal Polished - Ethiopian OpalKsmith Heritage Auctioneers4.3(47)See Sold PriceJul 26, 2025
1.99Ct Welo Black Opal Polished - Ethiopian OpalKsmith Heritage Auctioneers4.3(47)See Sold PriceJun 29, 2025
