![Australian Boulder Opal Pendant Set in 10K Yellow Gold](http://australianopalcutters.com/cdn/shop/files/20329532_1_6420b78d-6e07-4395-91a1-56bf51c171f8_{width}x.jpg?v=1733448942)
Boulder Opal - Natural Opal Type 2. Found in Queensland, Australia, it forms as silica saturated water filled cracks in the agate with the molecules assembling in a precise geometric array generating striking colour play. Arguably the rarest form of Opal. Guaranteed free from dyes and artificial treatments.