Phyllite
Shale is the parent rock. It is made up of clay minerals. Shale can metamorphose into slate, phyllite, schist or gneiss depending on the degree of heat and pressure. Phyllite has a greater degree of metamorphism than slate but less than schist. It is associated with regional metamorphism do to mountain building. It is primarily composed of quartz, sericite mica, and chlorite. Phyllite has larger crystals than slate. This gives it a greater degree of light reflection or sheen. The sheen is used to distinguish phyllite from slate. Back to Examples of Metamorphic Rocks
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Phyllite is a fined grained metamorphic rock. 
