Know all about Greywacke and Amphibolite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Amphibolite belongs to Metamorphic Rocks.Texture of Greywacke is Clastic whereas that of Amphibolite is Banded, Foliated, Massive. Greywacke appears Dull and Amphibolite appears Foliated. The luster of Greywacke is dull while that of Amphibolite is vitreous to dull. Greywacke and Amphibolite are 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 Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Amphibolite are cemetery markers, commemorative tablets, creating artwork.