Natural Multi Color Flashing Boulder Opal Gemstones 19.77 Ct. Free Form Cabochon Shape 32 x 17 Mm.Treasure of Gems & Jewelry4.5(267)$1Sep 12, 2026
Natural Multi Color Sparkling Matrix Boulder Opal Gemstones 3.35 Ct. Free Form Cabochon Shape 10.2 xTreasure of Gems & Jewelry4.5(267)$1Sep 18, 2026
3.86Ct Natural Ethiopian Opal - 13.8x9.6x5.6 mm , 569CKsmith Heritage Auctioneers4.4(49)$501 day Left
4.34 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 13.3x9.3mm, 4XMLazo Heritage4.4(22)$252 days Left
