Gemological Properties

Gemological Information for Kyanite
Color Light to Dark Blue, Colorless, Gray or Brown (Banded with Blue)
Crystal Structure Triclinic
Refractive Index 1.716 - 1.731
Durability Poor
Hardness 6 to 7.5 or 4 to 5 (Depending on Angle)
Similar Stones Idocrase, Epidote, Sapphire, Tanzanite, Spinel
Treatments None Known at this Time
Country of Origin U.S., Russia, India, Pakistan, Myanmar, Kenya, Brazil
Kyanite Care
Ultrasonic Cleaning Never
Steam Cleaning Never
Warm Soapy Water Safe
Chemical Attack Not Attacked
Light Sensitivity Stable
Heat Sensitivity Sensitive