MI'CA, noun [Latin mica a grain or particle; mico, to shine.] A mineral of a foliated structure, consisting of thin flexible lamels or scales, having a shining surface. The scales are sometimes parallel, sometimes interwoven, sometimes wavy or undulated, sometimes representing filaments. It is called also talck, glimmer, muscovy-glass, and glist.
Jameson subdivides mica into ten subspecies, viz. mica pinite, lepidolite, chlorite, green earth, talck, nacrite, potstone, steatite and figure stone.