Multi Color Sparkling Matrix Boulder Opal 3.35 Ct. Free Form Cabochon Shape 10.2 x 8.7 Mm GemstoneTreasure of Gems & Jewelry4.5(224)$16 hrs Left
Natural Multi Color Ridge Matrix Boulder Opal Gemstones 2.80 Ct. Free Form Cabochon 11.8 x 7 MmTreasure of Gems & Jewelry4.5(224)$1Apr 26, 2026
CHRYSOCOLLA CABOCHON ROCK STONE LAPIDARY SPECIMENCol. Christie Hatman Auctioneers4.4(510)$1813 hrs Left
5.01 Carats Koroit Boulder Opal Cabochon - Natural Australian Stones 12.2x9.6mm, 8XMThousandPlanet4.5(256)$51 day Left
7.13 Carats Multicolor Iridescent Boulder Opal Cabochon - Natural Australian Stone, 50XMThousandPlanet4.5(256)$51 day Left
2.73 Carats Koroit Yowah Opal Cabochon - Natural Australian Single Stone, 86XLThousandPlanet4.5(256)$51 day Left
6.68 Carats Cream-Blue Boulder Opal with Dark Matrix - Natural Australian Stone, 36XMThousandPlanet4.5(256)$51 day Left
15.19ct Boulder Opal Cabochon - Banded Matrix & Play-of-Color Specimen, 34XMThousandPlanet4.5(256)$51 day Left
2.88 Carats Koroit Yowah Opal Cabochon - Natural Australian Single Stone, 67XLThousandPlanet4.5(256)$51 day Left
