Sapphire
Calm and true affection is symbolized by the Sapphire -- a gem of many colors. Persions believed the earth rested on a large Sapphire which gave color to the sky. Actors consider the six-rayed Star Sapphire a good luck talisman. Sapphire is one of the few gems that has been successfuly synthesized by man.
- Hardness: 9
- Refractive Index: 1.762-1.770
- Usually heated to produce or intensify color, make color uniform or to lighten stones.