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