Know all about Rapakivi Granite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Rapakivi Granite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Rapakivi Granite is Granular, Phaneritic whereas that of Greywacke is Clastic. Rapakivi Granite appears Veined or Pebbled and Greywacke appears Dull. The luster of Rapakivi Granite is dull to grainy with sporadic parts pearly and vitreous while that of Greywacke is dull. Rapakivi Granite is available in black, grey, orange, pink, white 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 Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.