jinis
rhyolite
schists mica, schists calc-silicate, schists grafit, blueschists, whiteschists, greenschists, hornblende Schist, talc Schist, chlorite Schist, garnet Schist, Schist glaucophane.
fitur
rock grained banget nggoleki, iku salah siji sing paling tuwa, kuat lan paling angel rock
gampang pecah dadi lancip piring, Gamelan kanggo tutul