Ruby on matrix, UV light. Photo courtesy of liveauctioneers.com and Jasper52.
Translucent Red Glow in the dark Ruby Specimen
Ruby on matrix, UV light. Photo courtesy of liveauctioneers.com and Jasper52.
Article: Ruby and Sapphire Grading Tools
Credit: Jasper52
| Gemstone | Ruby, Corundum |
| Natural or man made | Natural |
| Gem State | Specimen |
| Color | Red |
| Transparency | Translucent |
| Photo phenomena | Glow in the Dark |
| Luminescence | Fluorescent |