Know all about Rhomb Porphyry and Shale properties here. All properties of rocks are important as they define the type of rock and its application. Rhomb Porphyry belongs to Igneous Rocks while Shale belongs to Sedimentary Rocks.Texture of Rhomb Porphyry is Aphanitic to Porphyritic whereas that of Shale is Clastic, Splintery. Rhomb Porphyry appears Rough and Shale appears Muddy. The luster of Rhomb Porphyry is subvitreous to dull while that of Shale is dull. Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors whereas Shale is available in black, brown, buff, green, grey, red, yellow 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 Shale are creating artwork, pottery.