Know all about Suevite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Suevite belongs to Metamorphic Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Suevite is Earthy whereas that of Greywacke is Clastic. Suevite appears Banded and Greywacke appears Dull. The luster of Suevite is earthy while that of Greywacke is dull. Suevite is available in black, brown, colourless, green, grey, pink colors whereas Greywacke is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Suevite are as a feed additive for livestock, gemstone, metallurgical flux, source of magnesia (mgo) and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.