Know all about Rhomb Porphyry and Schist 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 Schist belongs to Metamorphic Rocks.Texture of Rhomb Porphyry is Aphanitic to Porphyritic whereas that of Schist is Foliated, Platy. Rhomb Porphyry appears Rough and Schist appears Layered and Shiny. The luster of Rhomb Porphyry is subvitreous to dull while that of Schist is shiny. Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors whereas Schist is available in black, blue, brown, dark brown, green, grey, silver 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 Schist are used in aquariums, writing slates.