Queensland Boulder Opal, Koroit Opal and Yowah Nuts

Boulder opal forms naturally within ironstone, with the opal remaining attached to its host rock. This creates bold, organic patterns unique to each stone.

Yes. Australian boulder opal is generally only found in Queensland, Australia.

They are often more durable than crystal opals due to the ironstone backing, making them suitable for regular wear when set correctly and worn with care.

The natural ironstone creates contrast and grounding tones, giving boulder opals their distinctive, rugged appearance.