• Contraluz opal, front illumination - opal gems

    Opal Stone – Natural, Faceted, Colorless, 4 ct

    A contraluz opal from Mexico, illuminated from front (approximately 4 cts). Photo © Joel E. Arem, PhD, FGA. Used with permission.

    Article: Opal Stones and Gems: Value, Price, and Jewelry Information

    Credit: Joel E. Arem

    GemstoneOpal Stone
    Natural or man madeNatural
    Carat Weight4
    Gem StateFaceted
    Photo phenomenaPlay of Color