Presenting an extraordinary 18.5 carat natural Koroit Boulder Opal, polished on both sides and featuring rare white opal fire, framed by intricate blue and violet vein patterns running through rich ironstone matrix. This is a powerful collector’s piece or pendant stone with premium visual contrast and depth.

Opal Details:

• Opal Type: Natural Koroit Boulder Opal (Solid – Type 2)

• Carat Weight: 18.5 carats

• Origin: Koroit, Queensland, Australia

• Treatment: None – 100% natural

• Finish: High polish, both sides

• Shape: Rounded oval freeform

• Colours Visible: Electric blue, violet, white fire, golden brown, and black matrix

• Back: Beautifully patterned with dark blue and gold veins – completely polished and display-worthy

Features:

• Rare white flash opal window in the heart of ironstone

• Polished on both sides – can be used for display, setting, or wire wrapping

• Exceptional fire and patterning, especially under sunlight

• 100% Australian mined – ethically sourced from Koroit field

• Great investment stone for collectors, lapidarists, or bespoke jewellers