Gemological Information for Orthoclase Feldspar
Color: | Colorless, White, Green, Orange, Yellow, Brown, Gray and Black |
Crystal Structure: | Monoclinic |
Refractive Index: | 1.518 to 1.526 |
Durability: | Not Very Durable |
Hardness: | 6 to 6.5 |
Family: | Feldspar |
Similar Stones: | Chalcedony and Quartz |
Treatments: | Blue or Black Coating on Reverse |
Country of Origin: | Sri Lanka, Myanmar, India |
Orthoclase Feldspar Care
Ultrasonic Cleaning: | Never |
Steam Cleaning: | Never |
Warm Soapy Water: | Safe |
Chemical Attack: | Hydrofluoric Acid |
Light Sensitivity: | Stable |
Heat Sensitivity: | Can Crack or Cleave when Heated |
Sources
- Gem Reference Guide, Los Angeles: Gemological Institute of America, 1988. Pp. 103-105.
- Newman, Harold. An Illustrated Dictionary of Jewelry, New York: Thames and Hudson, 1981. Pp. 224.
- Schumann, Walter. Gemstones of the World, New York: Sterling Publishing, Co., 1977. Pp. 164.