Know all about Dacite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Dacite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Dacite is Aphanitic to Porphyritic whereas that of Greywacke is Clastic. Dacite appears Vesicular and Greywacke appears Dull. The luster of Dacite is subvitreous to dull while that of Greywacke is dull. Dacite is available in bluish - grey, brown, grey, light to dark grey 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 Dacite are commemorative tablets, creating artwork and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.