Know all about Claystone and Tephrite properties here. All properties of rocks are important as they define the type of rock and its application. Claystone belongs to Sedimentary Rocks while Tephrite belongs to Igneous Rocks.Texture of Claystone is Clastic whereas that of Tephrite is Aphanitic to Porphyritic. Claystone appears Rough and Dull and Tephrite appears Vesicular. The luster of Claystone is dull while that of Tephrite is subvitreous to dull. Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors whereas Tephrite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Claystone are pottery and that of Tephrite are production of lime, soil conditioner.