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