Natural Multi Color Flashing Boulder Opal Gemstones 19.77 Ct. Free Form Cabochon Shape 32 x 17 Mm.Treasure of Gems & Jewelry4.5(267)$1(1 bid)Sep 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)$1(1 bid)Sep 18, 2026
5.19Ct Natural Ethiopian Black Opal - 16.2x8.5x7.6 mm , 604CKsmith Heritage Auctioneers4.4(49)$501 hr Left
4.28Ct Natural Ethiopian Black Opal - 22.9x10.0x4.0 mm , 594CKsmith Heritage Auctioneers4.4(49)$501 hr Left
