Know all about Phyllite and Diabase properties here. All properties of rocks are important as they define the type of rock and its application. Phyllite belongs to Metamorphic Rocks while Diabase belongs to Igneous Rocks.Texture of Phyllite is Phyllitic Sheen, Slaty whereas that of Diabase is Aphanitic, Granular. Phyllite appears Crinkled or Wavy and Diabase appears Vesicular. The luster of Phyllite is phyllitic while that of Diabase is not available. Phyllite is available in black to grey, light greenish grey colors whereas Diabase 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 Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.