Know all about Schist and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Schist belongs to Metamorphic Rocks while Rhomb Porphyry belongs to Igneous Rocks.Texture of Schist is Foliated, Platy whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Schist appears Layered and Shiny and Rhomb Porphyry appears Rough. The luster of Schist is shiny while that of Rhomb Porphyry is subvitreous to dull. Schist is available in black, blue, brown, dark brown, green, grey, silver colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Schist are used in aquariums, writing slates 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).