• Coober Pedy - Olympic Australis opal

    Opal Stone – Natural, Cabochon, Green, 17500 ct

    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