• transparent opal - appraising opals

    Opal Stone – Natural, Faceted, Colorless, 3.19 ct

    "Contraluz" opal, Nevada (3.19). Photo © Joel E. Arem, PhD, FGA. Used with permission.

    Article: Appraising Opals

    Credit: Joel E. Arem, PhD, FGA

    GemstoneOpal Stone
    Natural or man madeNatural
    OriginUnited States
    Origin detailsNevada
    Carat Weight3.19
    Gem StateFaceted
    Photo phenomenaPlay of Color