Rocks, Minerals & Fossils

138ct. Australian Boulder Opal Cabochon Collection First Image

#image-loader-main { display: none; }

138ct. Australian Boulder Opal Cabochon Collection First Image

138ct. Australian Boulder Opal Cabochon Collection

Total Sales1 Sold

Median Sale Price

Sale Price Range

Similar Upcoming Sales

NATURAL LOT 113.5ct LARGE CABOCHON LOOSE ROYSTON TURQUOISE (1 of 2)

NATURAL LOT 113.5ct LARGE CABOCHON LOOSE ROYSTON TURQUOISE

6 days Left

48.8Ct Rough Opal Specimen Lot - Ethiopian Opal - Mineral Rough (1 of 3)

48.8Ct Rough Opal Specimen Lot - Ethiopian Opal - Mineral Rough

Ksmith Heritage Auctioneers

Jul 27, 2025

33.6Ct Rough Opal Specimen Lot - Ethiopian Opal - Mineral Rough (1 of 3)

33.6Ct Rough Opal Specimen Lot - Ethiopian Opal - Mineral Rough

Ksmith Heritage Auctioneers

Jul 26, 2025

3.11Ct Natural Flashy Rainbow Ethiopian Smoked Welo Opal 4 PCS LOT (1 of 4)

3.11Ct Natural Flashy Rainbow Ethiopian Smoked Welo Opal 4 PCS LOT

Ksmith Heritage Auctioneers

Feb 15, 2026

12.63 Carats Multi-Color Welo Opal Lot - Natural Ethiopian Stones, 59XC (1 of 1)

12.63 Carats Multi-Color Welo Opal Lot - Natural Ethiopian Stones, 59XC

4 days Left

4.74Ct Natural Ethiopian Welo Opal In Lot - Ethiopian Opal - Oval Cabochon (1 of 4)

4.74Ct Natural Ethiopian Welo Opal In Lot - Ethiopian Opal - Oval Cabochon

Ksmith Heritage Auctioneers

Feb 15, 2026

25 Carats of Ethiopian Welo Black Smoked Opal Cabochons, 52V (1 of 1)

25 Carats of Ethiopian Welo Black Smoked Opal Cabochons, 52V

4 days Left

Blue-Green Azurite Cabochon Parcel - Natural 11-Piece Lot, 2 to 3.7 cm, 86XE (1 of 2)

Blue-Green Azurite Cabochon Parcel - Natural 11-Piece Lot, 2 to 3.7 cm, 86XE

2 days Left

48.8Ct Rough Opal Specimen Lot - Ethiopian Opal - Mineral Rough (1 of 3)

48.8Ct Rough Opal Specimen Lot - Ethiopian Opal - Mineral Rough

Ksmith Heritage Auctioneers

Jun 29, 2025

24.95 Carats Pastel Play-of-Color Welo Opal Lot - Natural Ethiopian Stones - 11 to 14 mm, 49XK (1 of 1)

24.95 Carats Pastel Play-of-Color Welo Opal Lot - Natural Ethiopian Stones - 11 to 14 mm, 49XK

4 days Left

8.92ct LOOSE CABOCHON NATURAL AUSTRALIAN BOULDER OPAL (1 of 2)

8.92ct LOOSE CABOCHON NATURAL AUSTRALIAN BOULDER OPAL

Mar 01, 2026

19.85ct LOOSE CABOCHON NATURAL AUSTRALIAN BOULDER OPAL (1 of 2)

19.85ct LOOSE CABOCHON NATURAL AUSTRALIAN BOULDER OPAL

Mar 01, 2026

Natural Multi Color Opal Flashing Boulder 19.77 Ct. Free Form Cabochon Gemstone From Australia (1 of 3)

Natural Multi Color Opal Flashing Boulder 19.77 Ct. Free Form Cabochon Gemstone From Australia

Treasure of Gems & Jewelry

2 days Left

2.95ct LOOSE CABOCHON NATURAL AUSTRALIAN BOULDER OPAL (1 of 2)

2.95ct LOOSE CABOCHON NATURAL AUSTRALIAN BOULDER OPAL

Mar 01, 2026

12.30ct LOOSE CABOCHON NATURAL AUSTRALIAN BOULDER OPAL (1 of 2)

12.30ct LOOSE CABOCHON NATURAL AUSTRALIAN BOULDER OPAL

Mar 01, 2026

16.69 Carats Neon Black Opal Parcel - Natural Ethiopian Stones, 9-13mm, 58XH (1 of 1)

16.69 Carats Neon Black Opal Parcel - Natural Ethiopian Stones, 9-13mm, 58XH

2 days Left

Similar Sale History

Unlock All Prices

Sold

138ct. Australian Boulder Opal Cabochon Collection (1 of 7)

138ct. Australian Boulder Opal Cabochon Collection This 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.

Sold

96ct. Australian Boulder Opal Cabochon Collection (1 of 6)

96ct. Australian Boulder Opal Cabochon Collection This 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.

Sold

Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons (1 of 1)

Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons This collection of Australian matrix boulder opal cabochons, mined from Australia. These cabochons exemplify the exquisite craftsmanship and vibrant color play characteristic of modern opal cutting an

Sold

Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons (1 of 1)

Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons This collection of Australian matrix boulder opal cabochons, mined from Australia. These cabochons exemplify the exquisite craftsmanship and vibrant color play characteristic of modern opal cutting an

Sold

Natural Australian Matrix Boulder Opal Cabochons Gem Parcel Lot (1 of 1)

Natural Australian Matrix Boulder Opal Cabochons Gem Parcel Lot NO RESERVE AUCTION running!! Our upcoming No Reserve Auction offers an incredible collection of authentic ancient Roman coins, Viking jewelry, and historical artifacts spanning millennia. This is a ra

Sold

33Ct Box of Five Australian Koroit Yowah Boulder Opal Cabochon (1 of 2)

33Ct Box of Five Australian Koroit Yowah Boulder Opal Cabochon 20x13mm Weight: 33 carats (Before Packing) Thousand Planet Auction House Season 4: Ten2Go August Collection Auction. A bargain hunter's, fixer-upper's, and pack-rat's dream come true! Our Ten2Go "ware

26Ct Box of Five Australian Koroit Yowah Boulder Opal Cabochon (1 of 2)

26Ct Box of Five Australian Koroit Yowah Boulder Opal Cabochon 18x11mm Weight: 26 carats (Before Packing) Thousand Planet Auction House Season 4: Ten2Go August Collection Auction. A bargain hunter's, fixer-upper's, and pack-rat's dream come true! Our Ten2Go "ware

Sold

34.5Ct Box of Five Australian Koroit Yowah Boulder Opal Cabochon (1 of 2)

34.5Ct Box of Five Australian Koroit Yowah Boulder Opal Cabochon 19x13mm Weight: 34.5 carats (Before Packing) Thousand Planet Auction House Season 4: Ten2Go August Collection Auction. A bargain hunter's, fixer-upper's, and pack-rat's dream come true! Our Ten2Go "wa

38Ct Box of Four Australian Koroit Yowah Boulder Opal Cabochon (1 of 2)

38Ct Box of Four Australian Koroit Yowah Boulder Opal Cabochon 21x15mm Weight: 38 carats (Before Packing) Thousand Planet Auction House Season 4: Ten2Go August Collection Auction. A bargain hunter's, fixer-upper's, and pack-rat's dream come true! Our Ten2Go "ware

Sold

Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons (1 of 1)

Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons

Sold

Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons (1 of 1)

Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons Collection of Australian Artistic Modern Boulder Opal Matrix Boulder Opal Cabochons

Sold

457Ct Collection Of Amber Fossil Rough Specimen (1 of 3)

457Ct Collection Of Amber Fossil Rough Specimen Dimension: 70.7x60.6mm 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 Australi

Sold

49.2Ct Five Old Tibetan Himalayan Turquoise Zoomorphic Beads Asian Art Collection (1 of 2)

49.2Ct Five Old Tibetan Himalayan Turquoise Zoomorphic Beads Asian Art Collection Dimension: 21.5x15mm 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 Australian

Sold

39.5Ct A New Tibetan Ruyi dZi Bead Himalayan Asian Art Collection (1 of 4)

39.5Ct A New Tibetan Ruyi dZi Bead Himalayan Asian Art Collection Dimension: 37.3x11.8mm 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 Australi

Sold

62.5Ct An Old Western Asiatic Sardonyx Bead Near East Asian Art Collection (1 of 4)

62.5Ct An Old Western Asiatic Sardonyx Bead Near East Asian Art Collection Dimension: 39.7x15.2mm 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 Australi

Sold

Art Nouveau Yowah Australian Boulder Opal Diamond 14K Gold Stickpin (1 of 8)

Art Nouveau Yowah Australian Boulder Opal Diamond 14K Gold Stickpin This 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 a

Sold

22.92 ct Australian Boulder Opal Gemstone Cabochon (1 of 4)

22.92 ct Australian Boulder Opal Gemstone Cabochon 22.92 ct Boulder Opal cabochon. 28 x 18mm. Queensland Australia origin gemstone. Perfect shape & size for a lovely pendant.

Sold

8.7ct Australian Black Boulder Opal Cabochon (1 of 3)

8.7ct Australian Black Boulder Opal Cabochon 8.7ct Natural Australian Black Boulder Opal, gemstone cabochon, with nice place of color, ready to be mounted into a beautiful ring or pendant. 14x9x4mm

Sold

Australian Matrix Boulder Opal Cabochon Gem (1 of 2)

Australian Matrix Boulder Opal Cabochon Gem [No Reserve] Hi everyone, I am Mark, curating this special World's Beads Treasure Hunt for UNICEF. Every lot starts at just $15 with no reserve, no matter the cost. You determine the final price! We'v

Sold

Australian Matrix Boulder Opal Cabochon Gem (1 of 2)

Australian Matrix Boulder Opal Cabochon Gem Australian Matrix Boulder Opal Cabochon Gem

Sold

Australian Matrix Boulder Opal Cabochon Gems (1 of 2)

Australian Matrix Boulder Opal Cabochon Gems [No Reserve] Welcome to Auction 29 - No Reserve Tribal Treasures & Collector Beads! This special auction offers an incredible selection of collectible beads and tribal jewelry, all with no reserve. Ev

Sold

Australian Matrix Boulder Opal Cabochon Gems (1 of 2)

Australian Matrix Boulder Opal Cabochon Gems [No Reserve] Welcome to Auction 29 - No Reserve Tribal Treasures & Collector Beads! This special auction offers an incredible selection of collectible beads and tribal jewelry, all with no reserve. Ev

Sold

Australian Matrix Boulder Opal Cabochon Gems (1 of 2)

Australian Matrix Boulder Opal Cabochon Gems [No Reserve] Welcome to Auction 29 - No Reserve Tribal Treasures & Collector Beads! This special auction offers an incredible selection of collectible beads and tribal jewelry, all with no reserve. Ev

Sold

Lot of 3 Australian Matrix Boulder Opal Cabochons Gems (1 of 1)

Lot of 3 Australian Matrix Boulder Opal Cabochons Gems Lot of 3 Australian Matrix Boulder Opal Cabochons Gems

TOP