Gemological Properties

Gemological Information for Andalusite
Color Brownish to Yellowish Green, Green, Brown, rarely Pink
Crystal Structure Orthorhombic
Refractive Index 1.6345 - 1.643
Durability Fair to Good
Hardness 7 to 7.5
Varieties Chiastolite - Features a Cross Pattern
Similar Stones Tourmaline, Topaz, Barite, Apatite, Danburite, Chrysoberyl
Treatments Heat Treatment
Country of Origin Brazil, Sri Lanka
Andalusite Care
Ultrasonic Cleaning Use Caution
Steam Cleaning Risky
Warm Soapy Water Safe
Chemical Attack None
Light Sensitivity Stable
Heat Sensitivity Check for Liquid Inclusions

Online G&G articles on andalusite