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