• alexandrite buying - synthetic corundum

    Corundum

    Synthetic corundum fluoresces orange under ultraviolet light. This material is red-purple in incandescent light and greyish purple in natural light. "Alexandrite, synthetic corundum, 368nm fl" by Bob Fosbury. Public Domain.

    Article: Alexandrite Buying Guide

    Credit: Bob Fosbury

    GemstoneCorundum
    Natural or man madeLab-made
    Gem StateRough
    ColorRed
    TransparencyTransparent
    Photo phenomenaGlow in the Dark