• Geuda sapphires - Sri Lanka - ruby and sapphire origins

    Sapphire – Natural, Faceted, Orange

    Geudas are whitish, milky sapphires frequently found in Sri Lanka. With heat treatments, they can show fine blue as well as yellow and orange colors. Photo © Joel E. Arem, PhD, FGA. Used with permission.

    Article: Ruby and Sapphire Origins

    Credit: Joel E. Arem, PhD, FGA

    GemstoneSapphire, Corundum
    TreatmentsHeat Treatment
    Natural or man madeNatural
    OriginSri Lanka
    Gem StateFaceted
    ColorOrange, Yellow