• gem treatment survey results - leaded glass ruby - blue flash off fissues and air bubbles

    Ruby – Natural, Faceted, Red

    Leaded glass in this ruby shows as air bubbles and blue flashes along fissures. Due to the invasive treatment, some prefer to call leaded glass rubies "hybrid" stones. © Stone Group Laboratories. Used with permission.

    Article: Gem Treatment Survey: Is this Gem Natural?

    Credit: Stone Group Laboratories

    GemstoneRuby, Corundum
    Natural or man madeNatural
    Gem StateFaceted