Adjective
Pertaining to, or containing, mica; splitting into laminae or leaves like mica.
Source: Webster's dictionaryIn gneisses these alternating folia are sometimes thicker and less regular than in schists, but most importantly less micaceous; they may be lenticular, dying out rapidly. Source: Internet
Tewa Pueblo pottery is made by coating the clay with mica to provide a dense, glittery micaceous finish over the entire object. Source: Internet