Know all about Chert and Rapakivi Granite properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Rapakivi Granite belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Rapakivi Granite is Granular, Phaneritic. Chert appears Glassy or Pearly and Rapakivi Granite appears Veined or Pebbled. The luster of Chert is waxy and dull while that of Rapakivi Granite is dull to grainy with sporadic parts pearly and vitreous. Chert is available in black, brown, green, grey, red, white colors whereas Rapakivi Granite is available in black, grey, orange, 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 Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones.