Know all about Pseudotachylite and Slate properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite and Slate belong to Metamorphic Rocks.Texture of Pseudotachylite is Quench whereas that of Slate is Foliated. Pseudotachylite appears Dull and Soft and Slate appears Dull. The luster of Pseudotachylite is vitreous while that of Slate is dull. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Slate are blackboards, commemorative tablets, laboratory bench tops, standard material for the bed of billiard table, standard material for the beds of pool and snooker table, tombstones, used in aquariums, writing slates.