Know all about Hyaloclastite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Hyaloclastite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Hyaloclastite is Pyroclastic whereas that of Greywacke is Clastic. Hyaloclastite appears Dull and Greywacke appears Dull. The luster of Hyaloclastite is dull and grainy while that of Greywacke is dull. Hyaloclastite is available in brown, grey, yellow 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 Hyaloclastite are cemetery markers, creating artwork and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.