Interesting facts
- Largest cutable stone ~ 400 ct (~ 80 g)
- Highest price paid: 15.97 ct: $3,630,000 (US$) in 1988
- Often confused with other minerals e.g.:
- Crown Jewels: Black Prince's ruby and Timur ruby; Balas ruby = spinel
- Cape ruby = garnet
- Siberian ruby = tourmaline
- Few named rubies:
- 167 carat Edwardes ruby (British Museum)
- 100 carat DeLong star ruby (Am Mus Nat Hist)
- 138.7 ct Rosser-Reeves star ruby