Art Nouveau 12K Boulder Opal Ring Square which is an old Mine

which is an old Mine Cut

This timeless design would make for the most wonderful engagement ring

and the inside of the shank is stamped "CARTIER"

bloodstone

Measurements: The earrings hang approximately 1 3/4" long and measure about 3/8" at their widest point

Art Nouveau 12K Boulder Opal Ring Square which is an old MineBoulder opals are the rarest of all natural opal varieties, comprising only 2% of Australia's total opal population. In terms of value, they are considered second only to the popular Black Opal. The name "Boulder Opal" originates from their natural formation, where they are embedded into large ironstone boulders, often retaining part of their ironstone matrix when mined. Their unique appearance includes vibrant flashes of color enhanced by the