Know all about Tachylite and Aplite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite and Aplite belong to Igneous Rocks.Texture of Tachylite is Vitreous whereas that of Aplite is Granular, Graphic. Tachylite appears Glassy and Aplite appears Veined or Pebbled. The luster of Tachylite is resinous while that of Aplite is dull to pearly to subvitreous. Tachylite is available in black, dark brown colors whereas Aplite is available in black, grey, orange, pink, white colors. The commercial uses of Tachylite are cemetery markers, creating artwork and that of Aplite are curling, gemstone, laboratory bench tops, small sculptures, tombstones.