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