Know all about Diabase and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Diabase belongs to Igneous Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Diabase is Aphanitic, Granular whereas that of Pseudotachylite is Quench. Diabase appears Vesicular and Pseudotachylite appears Dull and Soft. The luster of Diabase is not available while that of Pseudotachylite is vitreous. Diabase is available in dark grey to black colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Pseudotachylite are creating artwork, gemstone.