• opal in breccia - opal prospecting and mining

    Opal Stone – Natural, Specimen, Red

    This rock is a piece of volcanic breccia where reddish opal formed in gas pockets. Photo by James St. John. Licensed under CC By 2.0.

    Article: Opal Prospecting and Mining

    Credit: James St. John

    GemstoneOpal Stone
    Natural or man madeNatural
    Gem StateSpecimen