Know all about Claystone and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Claystone belongs to Sedimentary Rocks while Rhomb Porphyry belongs to Igneous Rocks.Texture of Claystone is Clastic whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Claystone appears Rough and Dull and Rhomb Porphyry appears Rough. The luster of Claystone is dull while that of Rhomb Porphyry is subvitreous to dull. Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Claystone are pottery and that of Rhomb Porphyry are an oil and gas reservoir, as a feed additive for livestock, metallurgical flux, soil conditioner, source of magnesia (mgo).