Know all about Tachylite and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite and Rhyolite belong to Igneous Rocks.Texture of Tachylite is Vitreous whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Tachylite appears Glassy and Rhyolite appears Banded. The luster of Tachylite is resinous while that of Rhyolite is earthy. Tachylite is available in black, dark brown colors whereas Rhyolite is available in grey, white, light black colors. The commercial uses of Tachylite are cemetery markers, creating artwork and that of Rhyolite are gemstone, laboratory bench tops, jewelry.