Know all about Gossan and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Gossan and Pseudotachylite belong to Metamorphic Rocks.Texture of Gossan is Rough, Sandy whereas that of Pseudotachylite is Quench. Gossan appears Dull and Banded and Pseudotachylite appears Dull and Soft. The luster of Gossan is metallic while that of Pseudotachylite is vitreous. Gossan is available in brown, brown- black, gold, green, rust colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Pseudotachylite are creating artwork, gemstone.