Know all about Chert and Diabase properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Diabase belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Diabase is Aphanitic, Granular. Chert appears Glassy or Pearly and Diabase appears Vesicular. The luster of Chert is waxy and dull while that of Diabase is not available. Chert is available in black, brown, green, grey, red, white colors whereas Diabase is available in dark grey to black 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 Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.