- mica, isinglass - any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity
--1 is a kind of mineral; transparent substance, translucent substance
--1 has particulars:biotite; lepidolite; muscovite; paragonite; phlogopite; zinnwaldite