Category:Hydromica

Hy`dro*mi"ca, n. Etym: [Hydro-, 1 + mica.] (Min.)

Defn: A variety of potash mica containing water. It is less elastic than ordinary muscovite. Hydromica schist (Min.), a mica schist characterized by the presence of hydromica. It often has a silky luster and almost soapy feel.