Know all about Phyllite and Theralite properties here. All properties of rocks are important as they define the type of rock and its application. Phyllite belongs to Metamorphic Rocks while Theralite belongs to Igneous Rocks.Texture of Phyllite is Phyllitic Sheen, Slaty whereas that of Theralite is Phaneritic. Phyllite appears Crinkled or Wavy and Theralite appears Veined and Shiny. The luster of Phyllite is phyllitic while that of Theralite is waxy and dull. Phyllite is available in black to grey, light greenish grey colors whereas Theralite is available in dark grey to black colors. The commercial uses of Phyllite are cemetery markers, commemorative tablets, creating artwork, writing slates and that of Theralite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.