• grey opal - opal types

    Opal Stone – Natural, Tumbled, Gray

    This gray opal shows a wide range of hues in its play of color. "Precious opal (Bulldog Shale, Lower Cretaceous; Coober Pedy Opal Field, South Australia) 1," photo by James St. John. Licensed under CC By 2.0.

    Article: Eight Opal Types Explained

    Credit: James St. John

    GemstoneOpal Stone
    Natural or man madeNatural
    Origin detailsCoober Pedy Opal Field, South Australia
    Gem StateTumbled
    Photo phenomenaPlay of Color