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Brown and Blue Boulder Opal Sterling Silver Ring Size 7

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This beautiful ring contains a large brown and black gemstone ring with lovely specs of blue behind it, which makes me believe it is a type of boulder opal, more specifically a "koroit opal", The ring is made of sterling silver and the size is 7. The ring has been cleaned and will be wiped clean again before shipped.

The gemstone Opal is the official October birthstone as adopted by the American National Association of Jewelers in 1912. It is also the birth stone for the Zodiac sign of Libra.

Boulder opal is found in Australia where precious opal forms in veins and patches within brown ironstone boulders. When the opal is mixed through the ironstone it is called matrix opal.

Boulder opal is very durable due to the ironstone backing the opal forms on. Because water content within the opal is very low it almost never cracks or crazes as it ages.

This special ring is one of many that were passed down to me from my grandmother but unfortunately does not fit. Again, it's size 7. If you're interested but would like to see more pictures, I'd be glad to take more from different angles and on a finger.

I also have many other rings posted and will gladly combine shipping to make it as cheap as possible for you.

Thanks for looking!

Brown and Blue Boulder Opal Sterling Silver Ring Size 7


  • Vintage item from the 1960s
  • Materials: gemstone, opal, silver, sterling
  • Only ships within United States.
  • Feedback: 95 reviews
  • Favorited by: 19 people