Definitions for "Phyllite"
Keywords:  schist, slate, mica, metamorphic, sheen
Clay slate; argillaceous schist.
a light or dark-colored metamorphic rock similar to slate but more coarsely-grained and more metamorphosed. It is thinly layered with lustrous cleavage planes (from tiny pieces of mica).
metamorphic rock that is intermediate in grade between slate and mica schist. Small crystals of micas give a silky sheen to the cleavage surfaces.
Keywords:  ottrelite, mineral, related
A mineral related to ottrelite.