Know all about Pseudotachylite and Oil shale properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite belongs to Metamorphic Rocks while Oil shale belongs to Sedimentary Rocks.Texture of Pseudotachylite is Quench whereas that of Oil shale is Splintery. Pseudotachylite appears Dull and Soft and Oil shale appears Muddy. The luster of Pseudotachylite is vitreous while that of Oil shale is dull. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Oil shale is available in black, brown, buff, green, grey, red, yellow colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Oil shale are an oil and gas reservoir.