Know all about Phyllite and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Phyllite belongs to Metamorphic Rocks while Rhyodacite belongs to Igneous Rocks.Texture of Phyllite is Phyllitic Sheen, Slaty whereas that of Rhyodacite is Earthy. Phyllite appears Crinkled or Wavy and Rhyodacite appears Skeletal. The luster of Phyllite is phyllitic while that of Rhyodacite is greasy to dull. Phyllite is available in black to grey, light greenish grey colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Phyllite and Rhyodacite are cemetery markers, commemorative tablets, creating artwork, writing slates.