Sapphire, the blue variety of corundum, is one of the "Big Three" precious gemstones alongside ruby and emerald. This comprehensive guide covers sapphire formation, sources, colors, and value factors.
💙 Did You Know?
Sapphire is the birthstone for September and the traditional gift for 5th and 45th wedding anniversaries.
Sapphire is the birthstone for September and the traditional gift for 5th and 45th wedding anniversaries.
The Sapphire Family
While blue is the classic color, sapphires come in every rainbow color. Red corundum is ruby; all other colors are sapphire:
- Padparadscha: Rare pinkish-orange found almost exclusively in Sri Lanka
- Yellow Sapphire: Golden to lemon yellow, popular for astrological purposes
- Pink Sapphire: Light to medium pink, increasing in popularity
- White Sapphire: Colorless, used as diamond alternative
- Color-Change Sapphire: Blue to purple color change under different light
Properties
| Property | Value |
|---|---|
| Hardness (Mohs) | 9 (third hardest gemstone) |
| Specific Gravity | 3.99 - 4.01 |
| Refractive Index | 1.762 - 1.770 |