Know all about Greywacke and Blueschist properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Blueschist belongs to Metamorphic Rocks.Texture of Greywacke is Clastic whereas that of Blueschist is Foliated. Greywacke appears Dull and Blueschist appears Dull and Banded. The luster of Greywacke and Blueschist is dull. Greywacke is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Blueschist is available in blue, bluish - grey, purple, shades of blue colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.