• Coober Pedy - Olympic Australis opal

    Opal Stone

    This 3.5 kg beauty, the Olympic Australis opal, was found 10 meters below the surface at Coober Pedy. It's the most expensive opal in the world. © Opal Auctions. Used with permission.

    Article: Opal Mining in Coober Pedy: History and Methods

    Credit: Opal Auctions

    GemstoneOpal Stone
    Natural or man madeNatural
    Origin detailsCoober Pedy
    Carat Weight17500
    Gem StateCabochon
    Photo phenomenaPlay of Color