Gemological Properties

Gemological Information for Benitoite
Color Blue or Violet Blue, Rarely Colorless or Pink
Crystal Structure Hexagonal
Refractive Index 1.757 - 1.804
Durability Fair
Hardness 6 to 6.5
Similar Stones Azurite, Sapphire, Synthetic Sapphire
Treatments None Known at this Time
Country of Origin U.S.
Benitoite Care
Ultrasonic Cleaning Risky
Steam Cleaning Never
Warm Soapy Water Safe
Chemical Attack Attacked by Hydrofluoric Acid and Slowly Slowly Affected by Hydrochloric Acid
Light Sensitivity Stable
Heat Sensitivity No Rapid Temperature Changes

Online G&G articles on benitoite

Online Texts on benitoite