Boulder Opal is a type of opal that is still connected to its host rock, which is usually an iron stone or fossilized sandstone.
The natural formation of opal creates subtle differences in appearance, ensuring each ring is as unique as its weater.

-18k white, yellow and pink gold with Boulder opal and round brilliant diamonds
-Carat total weight 0,24
-3 x Boulder opal - approximately 8 mm in diameter.