Know all about Rhomb Porphyry and Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Rhomb Porphyry and Syenite belong to Igneous Rocks.Texture of Rhomb Porphyry is Aphanitic to Porphyritic whereas that of Syenite is Earthy. Rhomb Porphyry appears Rough and Syenite appears Banded and Foilated. The luster of Rhomb Porphyry and Syenite is subvitreous to dull. Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors whereas Syenite is available in brown, buff, cream, 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 Syenite are cemetery markers, creating artwork.