Know all about Rhomb Porphyry and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Rhomb Porphyry and Nephelinite belong to Igneous Rocks.Texture of Rhomb Porphyry is Aphanitic to Porphyritic whereas that of Nephelinite is Aphanitic. Rhomb Porphyry appears Rough and Nephelinite appears Skeletal. The luster of Rhomb Porphyry is subvitreous to dull while that of Nephelinite is vitreous to metallic. Rhomb Porphyry and Nephelinite are available in black, brown, colourless, green, grey, pink, white 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 Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).