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Boulder Opal Cabochons

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  1. Natural Australian Boulder Opal Cabochon 165 Carats

    Natural Australian Boulder Opal Cabochon 165 Carats

    This gorgeous Natural Australian Boulder Opal Cabochon would be absolutely eye-catching when set in a Sterling Silver pendant or ring! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The colors vary between brown, amber, purple and white. If the Aussies knew we were selling it for only $.50 a carat, they'd hunt us down!

    Known as the October birthstone and the Zod... Learn More

    Retail Price: $272.25

    Sale Price: $82.50

    You Save: 70%

  2. Natural Australian Boulder Mountain Dazzling Opal Gemstone Cabochon 205 Carats

    Natural Australian Boulder Mountain Dazzling Opal Gemstone Cabochon 205 Carats

    This gorgeous Natural Australian Boulder Opal Cabochon would be absolutely eye-catching when set in a Sterling Silver pendant or ring! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include brown, amber, blue, purple and white. If the Aussies knew we were selling it for only $.50 a carat, they'd hunt us down!

    Known as the October birthstone an... Learn More

    Retail Price: $338.50

    Sale Price: $102.50

    You Save: 70%

  3. Boulder Mountain Australian Natural Opal Cabochon 220 Carats

    Boulder Mountain Australian Natural Opal Cabochon 220 Carats

    This brilliant Boulder Mountain Australian Natural Opal Cabochon would be absolutely breathtaking when set in a Sterling Silver ring or pendant! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include brown, amber, blue, purple and white. If the Aussies knew we were selling it for only $.50 a carat, they'd hunt us down!

    Known as the October bir... Learn More

    Retail Price: $363.00

    Sale Price: $110.00

    You Save: 70%

  4. Boulder Mountain Vibrant Natural Australian Opal Cabochon 140 Carats

    Boulder Mountain Vibrant Natural Australian Opal Cabochon 140 Carats

    This brilliant Boulder Mountain Natural Australian Opal Cabochon would be absolutely breathtaking when set in a Sterling Silver ring or pendant! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include brown, amber, blue, purple and white. If the Aussies knew we were selling it for only $.50 a carat, they'd hunt us down!

    Known as the October bir... Learn More

    Retail Price: $231.00

    Sale Price: $70.00

    You Save: 70%

  5. Boulder Mountain Natural Gemstone Australian Opal Cabochon 110 Carats

    Boulder Mountain Natural Gemstone Australian Opal Cabochon 110 Carats

    This brilliant Boulder Mountain Natural Australian Opal Cabochon would be absolutely breathtaking when set in a Sterling Silver ring or pendant! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include white, purple, brown, blue and white. If the people in Australia knew we were selling opal stones for only $.50 a carat, they would hunt us down!

    ... Learn More

    Retail Price: $181.50

    Sale Price: $55.00

    You Save: 70%

  6. Australian Boulder Mountain Natural Opal Cabochon 185 Carats

    Australian Boulder Mountain Natural Opal Cabochon 185 Carats

    This magnificent Australian Boulder Mountain Natural Opal Cabochon would be absolutely beautiful set in Sterling Silver! You could purchase this natural Australian Opal cabochon to make your own jewelry or inquire about us creating a custom opal stone piece for you. This natural opal stone works well for wire wrapping. The range of colors include blue, brown, purple, umber and white. If the "people down under" in Australia found out we were selling it for only $.50 a carat, well, the... Learn More

    Retail Price: $305.25

    Sale Price: $92.50

    You Save: 70%

  7. Boulder Mountain Australian Natural Opal Cabochon 80 Carats

    Boulder Mountain Australian Natural Opal Cabochon 80 Carats

    This brilliant Boulder Mountain Australian Natural Opal Cabochon would be absolutely breathtaking when set in a Sterling Silver ring or pendant! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include brown, amber, blue, purple and white. If the Aussies knew we were selling it for only $.50 a carat, they'd hunt us down!

    Known as the October bir... Learn More

    Retail Price: $132.00

    Sale Price: $40.00

    You Save: 70%

  8. Australian Boulder Natural Opal Cabochon Stone 145 Carats

    Australian Boulder Natural Opal Cabochon Stone 145 Carats

    This eye-catching natural Opal Cabochon is an Australian Boulder Mountain Opal stone. Have us create a unique custom jewelry piece for you or design and make one yourself. Jewelry makers find this stone ideal for wire wrapping. This opal stone cabochon is brown with a range of purple that varies in hue and value. Please don’t tell anyone in Australia that this opal gemstone is selling for only $.50 a carat. If the Aussies find out, we’ll have to hide because they’ll be looking for u... Learn More

    Retail Price: $239.25

    Sale Price: $72.50

    You Save: 70%

  9. Australian Boulder Mountain Natural Opulent Opal Stone Cabochon 275 Carats

    Australian Boulder Mountain Natural Opulent Opal Stone Cabochon 275 Carats

    This eye-catching natural Opal Cabochon is an Australian Boulder Mountain Opal stone. Have us create a unique custom jewelry piece for you or design and make one yourself. Jewelry makers find this stone ideal for wire wrapping. This opal stone cabochon is brown with a range of purple that varies in hue and value. Please don’t tell anyone in Australia that this opal gemstone is selling for only $.50 a carat. If the Aussies find out, we’ll have to hide because they’ll be looking for u... Learn More

    Retail Price: $453.70

    Sale Price: $137.50

    You Save: 70%

  10. Australian Boulder Natural Radiant Opal Cabochon 230 Carats

    Australian Boulder Natural Radiant Opal Cabochon 230 Carats

    This eye-catching natural Opal Cabochon is an Australian Boulder Mountain Opal stone. Have us create a unique custom jewelry piece for you or design and make one yourself. Jewelry makers find this stone ideal for wire wrapping. This opal stone cabochon is brown with a range of purple that varies in hue and value. Please don’t tell anyone in Australia that this opal gemstone is selling for only $.50 a carat. If the Aussies find out, we’ll have to hide because they’ll be looking for u... Learn More

    Retail Price: $379.50

    Sale Price: $115.00

    You Save: 70%

  11. Australian Boulder Mountain Natural Brilliant Opal Stone Cabochon 485 Carats

    Australian Boulder Mountain Natural Brilliant Opal Stone Cabochon 485 Carats

    This wonderful Boulder Mountain Natural Australian Opal Cabochon would be absolutely breathtaking when set in a Sterling Silver. The large natural Australian Opal stone cabochon can be used in your own jewelry design or we can create an opal piece of jewelry fo you. Those who make jewelry find this ideal for the wire wrapping technique. The colors range from brown to varying hues and values of purple. If the Aussies heard we had been selling this opal stone cabs for only $.50 a carat... Learn More

    Retail Price: $800.25

    Sale Price: $242.50

    You Save: 70%

  12. Australian Boulder Natural Vibrant Opal Cabochon 165 Carats

    Australian Boulder Natural Vibrant Opal Cabochon 165 Carats

    This brilliant Australian Boulder Natural Opal Stone Cabochon would be beautiful in a sterling silver setting. The one-of-a kind natural Australian Opal stone cab can be used in your own jewelry design or we can create an opal piece of jewelry for you. Those who make jewelry find this ideal for the wire wrapping technique. The colors range from brown to varying hues and values of purple. If the Aussies heard we had been selling this opal stone cabs for only $.50 a carat, they would ... Learn More

    Retail Price: $272.50

    Sale Price: $82.50

    You Save: 70%

  13. Australian Natural Opal Stone Cabochon 100 Carats

    Australian Natural Opal Stone Cabochon 100 Carats

    This vibrant Australian Natural Opal Stone Cabochon would be a conversation piece when set in sterling silver ring or pendant. The Australian Opal stone cab can be used in your own jewelry making or let us create or a custom jewelry for you! Jewelers find this particular opal stone ideal to wire wrap. The natural stone opal cabochon is brown, white and purple. If the "people from down under" in Australia knew this store was selling an Australian opal gemstone for only $.50 a carat, ... Learn More

    Retail Price: $165.00

    Sale Price: $50.00

    You Save: 70%

  14. Natural Australian Boulder Opal Gemstone Cabochon 110 Carats

    Natural Australian Boulder Opal Gemstone Cabochon 110 Carats

    This gorgeous Natural Australian Boulder Opal Cabochon would be absolutely eye-catching when set in a Sterling Silver pendant or ring! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include brown, amber, purple and white. If the Aussies knew we were selling it for only $.50 a carat, they'd hunt us down!

    Known as the October birthstone and the ... Learn More

    Retail Price: $181.50

    Sale Price: $55.00

    You Save: 70%

  15.  Australian Boulder Natural Opulent Opal Gemstone Cabochon 60 Carats

    Australian Boulder Natural Opulent Opal Gemstone Cabochon 60 Carats

    This gorgeous Natural Australian Boulder Opal Cabochon would be absolutely eye-catching when set in a Sterling Silver pendant or ring! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include brown, amber, purple and white. If the Aussies knew we were selling it for only $.50 a carat, they'd hunt us down!

    Known as the October birthstone and the ... Learn More

    Retail Price: $99.00

    Sale Price: $30.00

    You Save: 70%

  16. Boulder Mountain Natural Gem Australian Opal Cabochon 50 Carats

    Boulder Mountain Natural Gem Australian Opal Cabochon 50 Carats

    This brilliant Boulder Mountain Natural Australian Opal Cabochon would be absolutely breathtaking when set in a Sterling Silver ring or pendant! Purchase this natural Australian Opal cabochon to make your own jewelry or ask us to create a custom one-of-a-kind piece for you. It is ideal for wire wrapping. The array of colors include white, purple, brown, blue and white. If the people in Australia knew we were selling opal stones for only $.50 a carat, they would hunt us down!

    ... Learn More

    Retail Price: $82.50

    Sale Price: $25.00

    You Save: 70%

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Boulder Opal Cabochons

Boulder Opal Cabochon

Boulder Opal, found in Australia where the opal forms into veins and patches within brown ironstone boulders. When opal is mixed with the ironstone it's called matrix opal. The hardness of Boulder Opal ranges between 5.5 and 6 on the Mohs scale. Boulder opal is a very durable stone because of the ironstone backing the opal forms on. If the water content within the opal is low it almost never cracks or crazes as it ages.