File:Andesine is a silicate mineral.jpg

Summary
Andesine is a silicate mineral, of the plagioclase feldspar solid solution series(Ca,Na)(Al,Si)4O8, where Ca/(Ca + Na) (% Anorthite) is between 30%-50%.The formula may be written as Na0.7-0.5Ca0.3-0.5Al1.3-1.5Si2.7-2.5O8.jpg