• heat-treated geuda sapphire - Sri Lanka

    Sapphire – Natural, Faceted, Orange, 3.60 ct

    For decades, milky whitish sapphires from Sri Lanka known as geudas were heated at a high temperature to produce superb blue colors. However, this process can also turn geudas into fine yellow and orange gems, such as this 3.60-ct specimen. Photo © Joel E. Arem, PhD, FGA. Used with permission.

    Article: Sapphire Value, Price, and Jewelry Information

    Credit: Joel E. Arem, PhD, FGA

    GemstoneSapphire, Corundum
    TreatmentsHeat Treatment
    Natural or man madeNatural
    OriginSri Lanka
    Carat Weight3.60
    Gem StateFaceted