Know all about Chert and Tephrite properties here. All properties of rocks are important as they define the type of rock and its application. Chert belongs to Sedimentary Rocks while Tephrite belongs to Igneous Rocks.Texture of Chert is Banded, Rough whereas that of Tephrite is Aphanitic to Porphyritic. Chert appears Glassy or Pearly and Tephrite appears Vesicular. The luster of Chert is waxy and dull while that of Tephrite is subvitreous to dull. Chert is available in black, brown, green, grey, red, white colors whereas Tephrite is available in black, brown, colourless, green, grey, 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 Tephrite are production of lime, soil conditioner.