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