Know all about Mudstone and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Mudstone belongs to Sedimentary Rocks while Tachylite belongs to Igneous Rocks.Texture of Mudstone is Clastic whereas that of Tachylite is Vitreous. Mudstone appears Rough and Dull and Tachylite appears Glassy. The luster of Mudstone is dull while that of Tachylite is resinous. Mudstone is available in black, blue, brown, green, grey, orange, red, white, yellow colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Mudstone are creating artwork, pottery and that of Tachylite are cemetery markers, creating artwork.