Know all about Rhyodacite and Ganister properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite belongs to Igneous Rocks while Ganister belongs to Sedimentary Rocks.Texture of Rhyodacite is Earthy whereas that of Ganister is Clastic, Granular, Rough. Rhyodacite appears Skeletal and Ganister appears Rough. The luster of Rhyodacite is greasy to dull while that of Ganister is dull. Rhyodacite is available in black to grey, dark greenish - grey colors whereas Ganister 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 Rhyodacite are cemetery markers, creating artwork and that of Ganister are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.