Know all about Marl and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Marl belongs to Sedimentary Rocks while Rhyolite belongs to Igneous Rocks.Texture of Marl is Earthy whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Marl appears Rough and Dull and Rhyolite appears Banded. The luster of Marl is dull while that of Rhyolite is earthy. Marl is available in beige, brown, green, grey, white colors whereas Rhyolite is available in grey, white, light black colors. The commercial uses of Marl are creating artwork, soil conditioner and that of Rhyolite are gemstone, laboratory bench tops, jewelry.