Natural Multi Color Opal Flashing Boulder 19.77 Ct. Free Form Cabochon Gemstone From AustraliaTreasure of Gems & Jewelry4.4(215)$12 days Left
*1.91Ct Welo Black Opal Polished - Ethiopian OpalKsmith Heritage Auctioneers4.3(45)See Sold PriceJun 29, 2025
Sold8.7ct Australian Black Boulder Opal Cabochon8.7ct Natural Australian Black Boulder Opal, gemstone cabochon, with nice place of color, ready to be mounted into a beautiful ring or pendant. 14x9x4mmSee Sold Price
1.99Ct Natural Loose Australian Lightning Ridge Black Opal CabochonDimension: 12.7x9.7mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustraliaSee Sold Price
54.5Ct Natural Australian Lightning Ridge Black Opal Specimen Rough JarDimension: 5mm-17mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustralianSee Sold Price
Sold4.5Ct Natural Loose Australian Lightning Ridge Black Opal CabochonDimension: 20.5x13.2mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustraliSee Sold Price
Sold55Ct Natural Australian Lightning Ridge Black Opal Specimen Rough JarDimension: 6mm-15mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustralianSee Sold Price
7.3Ct Natural Loose Australian Lightning Ridge Black Opal CabochonDimension: 15.8x12.4mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustraliSee Sold Price
Sold2.1Ct Natural Loose Australian Lightning Ridge Black Opal CabochonDimension: 14.5x10.6mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustraliSee Sold Price
62Ct Natural Australian Lightning Ridge Black Opal Specimen Rough JarDimension: 4mm-12mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustralianSee Sold Price
Sold52Ct Natural Australian Lightning Ridge Black Opal Specimen Rough JarDimension: 5mm-18mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustralianSee Sold Price
Sold4Ct Tibetan Agate Rare Black Line 3 Stripes Chung DZi Bead Asian ArtDimension: 14x6.2mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustralianSee Sold Price
Sold47.5Ct Himalayan Tibetan Etched Black Agate DZi Bead Asian Art CarvingDimension: 19.4x18.6mm Natural History of Australian Opal & Mineral Auction by Thousand Planet Auction House featuring the beauty of Boulder Opal art in cabochon cutting and rough, well known AustraliSee Sold Price
Sold96ct. Australian Boulder Opal Cabochon CollectionThis is a collection of Australian Boulder Opal cabochons. The opal was mined in the Outback of Queensland in Australia. Each one shows fantastic flash and colors of blue, green, red, purple and pink.See Sold Price
Sold138ct. Australian Boulder Opal Cabochon CollectionThis is a collection of Australian Boulder Opal cabochons. The opal was mined in the Outback of Queensland in Australia. Each one shows fantastic flash and colors of blue, green, red, purple and pink.See Sold Price
Sold15.3 Carats of Australian Black Boulder Opal3.06 grams or 15.3 carats. 1/2" by 5/8".See Sold Price
Sold12 Carats of Australian Black Boulder Opal2.44 grams or 12 carats. Meausres 3/4" by 1/2" by 1/4"See Sold Price
SoldArt Nouveau Yowah Australian Boulder Opal Diamond 14K Gold StickpinThis is an antique Art Nouveau 14K gold stickpin featuring a fine Yowah Australian boulder opal cabochon and two Old European cut diamonds. The diamonds are I clarity and HI color. It is 2 1/2" long aSee Sold Price
