Know all about Trachyandesite and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite and Rhomb Porphyry belong to Igneous Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Trachyandesite appears Dull and Soft and Rhomb Porphyry appears Rough. The luster of Trachyandesite is earthy while that of Rhomb Porphyry is subvitreous to dull. Trachyandesite is available in black, brown, light to dark grey colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Trachyandesite are creating artwork, pottery 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).