Before the XIXème century, Ruby, red Spinel and Garnet were often confused and called carbuncles.
The most famous Rubies are:
- The Ruby Edward at the British Museum in London (167 cts).
- The star Ruby Reeves at the Smithsonian Institut in New-York (138 cts).
- The star Ruby De Long at the American Museum in New-York (100 cts).
- The star Ruby Edward at the British Museum in London (167 cts).
The Ruby is one of the four gemstones called precious stones: Diamond, Emerald, Ruby, Sapphire.