Know all about Porphyry and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Porphyry and Rhyodacite belong to Igneous Rocks.Texture of Porphyry is Porphyritic whereas that of Rhyodacite is Earthy. Porphyry appears Dull and Rhyodacite appears Skeletal. The luster of Porphyry is dull while that of Rhyodacite is greasy to dull. Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Porphyry are creating artwork, gemstone, jewelry and that of Rhyodacite are cemetery markers, creating artwork.