Know all about Blueschist and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Blueschist belongs to Metamorphic Rocks while Tachylite belongs to Igneous Rocks.Texture of Blueschist is Foliated whereas that of Tachylite is Vitreous. Blueschist appears Dull and Banded and Tachylite appears Glassy. The luster of Blueschist is dull while that of Tachylite is resinous. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Blueschist and Tachylite are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.