6.11Ct Natural Ethiopian Black Opal - 14.2x11.4x7.9 mm , 571CKsmith Heritage Auctioneers4.4(49)$501081 Lots Away
3.91Ct Natural Ethiopian Black Opal - 14.1x9.8x5.7 mm , 603CKsmith Heritage Auctioneers4.4(49)$501028 Lots Away
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
4.34 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 13.3x9.3mm, 4XMLazo Heritage4.4(22)$2516 hrs Left
