Know all about Chert and Foidolite properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Foidolite belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Foidolite is Earthy. Chert appears Glassy or Pearly and Foidolite appears Dull. The luster of Chert is waxy and dull while that of Foidolite is subvitreous to dull. Chert is available in black, brown, green, grey, red, white colors whereas Foidolite 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 Foidolite are cemetery markers, commemorative tablets, creating artwork.