Hydromica
Pronunciation : Hy`dro*mi"ca
Part of Speech : n.
Etymology : [Hydro-, 1 + mica.] (Min.)
Definition : 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.
Source : Webster's Unabridged Dictionary, 1913