16 carat high grade Koroit Boulder Opal ring is full of tremendous banding and sparkling color. Boulder opals are considered by many industry experts as one of the rarest opals in the world. Photos of the front and back of the cabochon before it was made into a ring are the last two photos of this listing.

925 Sterling Silver Band; US Size 8.5

Locality: Queensland, Austrailia

Dimensions: 22 x 16 x 5 mm