rhomb porphyry
schists mica, schists calc-silicate, schists grafit, blueschists, whiteschists, greenschists, hornblende Schist, talc Schist, chlorite Schist, garnet Schist, Schist glaucophane.
umume atos kanggo tutul, iku salah siji saka rock tuwa, lumahan asring mengilap
gampang pecah dadi lancip piring, Gamelan kanggo tutul