Know all about Rhomb Porphyry and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Rhomb Porphyry belongs to Igneous Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Rhomb Porphyry is Aphanitic to Porphyritic whereas that of Pseudotachylite is Quench. Rhomb Porphyry appears Rough and Pseudotachylite appears Dull and Soft. The luster of Rhomb Porphyry is subvitreous to dull while that of Pseudotachylite is vitreous. Rhomb Porphyry and Pseudotachylite are available in black, brown, colourless, 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 Pseudotachylite are creating artwork, gemstone.