Physical Properties
- hardness:
- 6-6.5 (Mohs scale)
- crystal:
- Hexagonal
- composition:
- Barium titanium silicate (BaTiSi₃O₉)
- colors:
- Blue (most common), colorless, pink
History & Formation
Discovered in 1907 in California, benitoite is extremely rare and found almost exclusively in San Benito County. It became California's official state gem in 1985.
Care & Maintenance
Handle with care due to moderate hardness. Clean with mild soap and water. Avoid harsh chemicals and extreme temperature changes.
Collector Value
As one of the rarest gemstones in the world, benitoite is highly sought after by collectors. Clean, well-cut specimens command significant premiums.