Know all about Greywacke and Larvikite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Larvikite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Larvikite is Phaneritic. Greywacke appears Dull and Larvikite appears Shiny. The luster of Greywacke is dull while that of Larvikite is subvitreous to dull. Greywacke and Larvikite 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 Larvikite are cemetery markers, commemorative tablets, creating artwork.