All rubies are red (pink is another matter), but not all red gems are rubies. Gem identification involves conducting tests of a gem's optical and physical properties to narrow a list of possibilities down to one. It also involves observation tempered by knowledge and experience. “Oval Ruby,” 2.16 cts, Sri Lanka. © All That Glitters. Used with permission.
Red Ruby, 2.16 ct Faceted Oval Cut from Sri Lanka
All rubies are red (pink is another matter), but not all red gems are rubies. Gem identification involves conducting tests of a gem's optical and physical properties to narrow a list of possibilities down to one. It also involves observation tempered by knowledge and experience. Oval-cut ruby, 2.16 cts, Sri Lanka. © All That Glitters. Used with permission.
Article: An Introduction to Gem Identification
Credit: All That Glitters
| Gemstone | Ruby, Corundum |
| Natural or man made | Natural |
| Origin | Sri Lanka |
| Carat Weight | 2.16 |
| Gem State | Faceted |
| Color | Red |
| Transparency | Transparent |