Raw Queensland Boulder Opal Rough

Crafting Geological Treasures directly from Host Ironstone

For amateur lapidary hobbyists and professional gem cutters, Queensland boulder rough provides an exceptionally exciting cutting challenge. In western Queensland, precious opal forms as thin veins running through large ironstone boulders. When mining, these boulders are split open to expose the color bars, resulting in rough specimens still naturally attached to their brown, chocolate ironstone host matrix.

Cutting this rough requires utilizing specialized diamond lapidary wheels to gently grind away surplus ironstone, exposing the natural face and color veins while leaving the host rock intact on the back. This preserves the stone’s organic freeform shape and outstanding structural durability. Because of the speculative nature of exposing hidden sand pockets or uncovering brilliant rainbow fire, all rough boulder specimens are final sale.