Know all about Chert and Minette properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Minette belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Minette is Porphyritic. Chert appears Glassy or Pearly and Minette appears Dull, Banded and Foilated. The luster of Chert is waxy and dull while that of Minette is subvitreous to dull. Chert is available in black, brown, green, grey, red, white colors whereas Minette is available in black, bluish - grey, brown, dark greenish - grey, green, grey 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 Minette are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo).