Know all about Tachylite and Mugearite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite and Mugearite belong to Igneous Rocks.Texture of Tachylite is Vitreous whereas that of Mugearite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Tachylite appears Glassy and Mugearite appears Dull and Soft. The luster of Tachylite is resinous while that of Mugearite is not available. Tachylite is available in black, dark brown colors whereas Mugearite is available in black, brown, light to dark grey colors. The commercial uses of Tachylite and Mugearite are cemetery markers, creating artwork.