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