Know all about Dacite and Itacolumite properties here. All properties of rocks are important as they define the type of rock and its application. Dacite belongs to Igneous Rocks while Itacolumite belongs to Sedimentary Rocks.Texture of Dacite is Aphanitic to Porphyritic whereas that of Itacolumite is Clastic, Granular, Rough. Dacite appears Vesicular and Itacolumite appears Rough. The luster of Dacite is subvitreous to dull while that of Itacolumite is dull. Dacite is available in bluish - grey, brown, grey, light to dark grey colors whereas Itacolumite 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 Itacolumite are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.