Know all about Teschenite and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Teschenite and Tachylite belong to Igneous Rocks.Texture of Teschenite is Phaneritic whereas that of Tachylite is Vitreous. Teschenite appears Veined and Shiny and Tachylite appears Glassy. The luster of Teschenite is not available while that of Tachylite is resinous. Teschenite is available in dark grey to black colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Teschenite and Tachylite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.