Know all about Greywacke and Migmatite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Migmatite belongs to Metamorphic Rocks.Texture of Greywacke is Clastic whereas that of Migmatite is Foliated. Greywacke appears Dull and Migmatite appears Dull, Banded and Foilated. The luster of Greywacke is dull while that of Migmatite is dull to pearly to subvitreous. 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 Migmatite is available in black, bluish - grey, brown, brown- black, dark greenish - grey, dark grey to black colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Migmatite are cemetery markers, jewelry, tombstones, used to manufracture paperweights and bookends.