Leaded glass in this ruby shows as air bubbles and blue flashes along fissures. Stone Group Laboratories. Used with permission.
Translucent Red Ruby Faceted, Fracture/cavity filling
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
| Gemstone | Ruby, Corundum |
| Treatments | fracture/cavity_filling |
| Natural or man made | Natural |
| Gem State | Faceted |
| Color | Red |
| Transparency | Translucent |