• opalized fossil - opal types

    Opal Stone – Natural, Specimen, White

    Common and precious opal replaced this bivalve's original shell, making it a spectacular fossil. "Opalized fossil bivalve (Bulldog Shale, Lower Cretaceous; Coober Pedy Opal Field, South Australia) 13," 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 StateSpecimen
    Photo phenomenaPlay of Color