Know all about Troctolite and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite and Rhomb Porphyry belong to Igneous Rocks.Texture of Troctolite is Phaneritic whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Troctolite appears Veined and Shiny and Rhomb Porphyry appears Rough. The luster of Troctolite is not available while that of Rhomb Porphyry is subvitreous to dull. Troctolite is available in dark grey to black colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, 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).