Know all about Rhomb Porphyry and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Rhomb Porphyry and Rhyodacite belong to Igneous Rocks.Texture of Rhomb Porphyry is Aphanitic to Porphyritic whereas that of Rhyodacite is Earthy. Rhomb Porphyry appears Rough and Rhyodacite appears Skeletal. The luster of Rhomb Porphyry is subvitreous to dull while that of Rhyodacite is greasy to dull. Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Rhomb Porphyry are an oil and gas reservoir, as a feed additive for livestock, metallurgical flux, soil conditioner, source of magnesia (mgo) and that of Rhyodacite are cemetery markers, creating artwork.