• black opal with blue body color

    Opal Stone – Natural, Other, Blue

    Black blue opal (a black opal with blue body color). Photo © Joel E. Arem, PhD, FGA. Used with permission.

    Article: Appraising Opals

    Credit: Joel E. Arem, PhD, FGA

    GemstoneOpal Stone
    Natural or man madeNatural
    Gem StateOther
    Photo phenomenaPlay of Color