The Probert Encyclopaedia of Rocks & Minerals

MICA

Mica refers to a group of more than thirty silicate minerals having perfect cleavage in one direction and which easily split into thin, elastic, sheets.
Micas are closely associated with clay minerals such as gibbsite and kaolinite.
Micas are highly resistant to electricity and heat and are widely used in industry as insulators, and are also added to pint and wallpapers to give them a silky lustre.

Research Mica