Know all about Chert and Rhomb Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Rhomb Porphyry belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Rhomb Porphyry is Aphanitic to Porphyritic. Chert appears Glassy or Pearly and Rhomb Porphyry appears Rough. The luster of Chert is waxy and dull while that of Rhomb Porphyry is subvitreous to dull. Chert is available in black, brown, green, grey, red, white colors whereas Rhomb Porphyry is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms 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).