• Synthetic star rubies and sapphires

    Sapphire – Lab-made, Cabochon, Red

    All gem varieties of corundum can be synthesized through various methods, including the coveted "star stone"sapphires and rubies, such as these "Heller Hope" star gems. Photo © Joel E. Arem, PhD, FGA. Used with permission.

    Article: What are Lab-Grown Sapphires?

    Credit: Joel E. Arem, PhD, FGA

    GemstoneSapphire, Corundum
    Natural or man madeLab-made
    Gem StateCabochon
    ColorRed, Yellow, Green, Blue, Pink, White
    Photo phenomenaAsterism