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Hiddenite

Hiddenite is the strongly pleochroic, bright green variety of spodumene. First discovered in North Caroline by W. E. Hidden in 1879.

Gemological Information for Hiddenite

  
Color:Green
Crystal Structure:Monoclinic
Refractive Index:1.662 to 1.676
Durability:Poor
Hardness:6.5 to 7
Family:
Similar Stones:Tourmaline, Peridot, Beryl
Treatments:Irradiation
Country of Origin:Afghanistan, Madagascar

Hiddenite Care

  
Ultrasonic Cleaning:Never
Steam Cleaning:Never
Warm Soapy Water:Safe
Chemical Attack:Reacts Slowly to Hydrofluoric Acid
Light Sensitivity:Irradiated Green Fades Quickly
Heat Sensitivity:Sensitive

Sources

  • Gem Reference Guide, Los Angeles: Gemological Institute of America, 1988. Pp. 229-231.
  • Newman, Harold. An Illustrated Dictionary of Jewelry, New York: Thames and Hudson, 1981. Pp. 154-155.
  • Schumann, Walter. Gemstones of the World, New York: Sterling Publishing, Co., 1977. Pp. 114.