Nephelite

Name:
Nephelite
Detailed information:

M Formula:	(Na,K)(Al,Si)2O4
Properties:
Colorless, white, or yellowish; vitreous to greasy luster. Mohs hardness 5.5–6, d 2.55–2.65.
Occurrence:
The former U.S.S.R., Ontario, Norway, South Africa, Maine, Arkansas, New Jersey.
Use:
Ceramic and glass manufacture, enamels, source of potash and aluminum (the former U.S.S.R.).