Gemological Information for Thulite

Color:Pink (Sometimes with White Streaks)
Crystal Structure:Orthorhombic
Refractive Index:1.691 to 1.700
Durability:Fair to Poor
Hardness:Fair to Poor
Similar Stones:Rhodonite, Hydrogrossular Garnet
Treatments:None Known
Country of Origin:Tanzania, Austria, Germany, Italy, Mexico, Switzerland, U.S.

Thulite Care

Ultrasonic Cleaning:Never
Steam Cleaning:Never
Warm Soapy Water:Safe
Chemical Attack:Hydrochloric and Hydrofluoric Acids Attack
Light Sensitivity:Stable
Heat Sensitivity:Jeweler's Torch May Fuse


  • Gem Reference Guide, Los Angeles: Gemological Institute of America, 1988. Pp. 262-264.
  • Schumann, Walter. Gemstones of the World, New York: Sterling Publishing, Co., 1977. Pp. 160.
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