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