Know all about Arkose and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Arkose belongs to Sedimentary Rocks while Tachylite belongs to Igneous Rocks.Texture of Arkose is Clastic whereas that of Tachylite is Vitreous. Arkose appears Rough and Dull and Tachylite appears Glassy. The luster of Arkose is dull while that of Tachylite is resinous. Arkose is available in reddish brown colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones and that of Tachylite are cemetery markers, creating artwork.