Know all about Rapakivi Granite and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Rapakivi Granite and Rhomb Porphyry belong to Igneous Rocks.Texture of Rapakivi Granite is Granular, Phaneritic whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Rapakivi Granite appears Veined or Pebbled and Rhomb Porphyry appears Rough. The luster of Rapakivi Granite is dull to grainy with sporadic parts pearly and vitreous while that of Rhomb Porphyry is subvitreous to dull. Rapakivi Granite is available in black, grey, orange, pink, white colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones 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).