Know all about Blue Granite and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Blue Granite and Rhomb Porphyry belong to Igneous Rocks.Texture of Blue Granite is Phaneritic whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Blue Granite appears Shiny and Rhomb Porphyry appears Rough. The luster of Blue Granite and Rhomb Porphyry is subvitreous to dull. Blue Granite is available in black, brown, light to dark grey, white colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling 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).