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