Know all about Tephrite and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Chalk is Clastic or Non-Clastic. Tephrite appears Vesicular and Chalk appears Soft. The luster of Tephrite is subvitreous to dull while that of Chalk is dull. Tephrite is available in black, brown, colourless, green, grey, white colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Chalk are alumina refineries, creating artwork, drawing on blackboards, gymnasts, athletes and mountain climbers use for grip, in aquifers, paper industry, production of lime, raw material for manufacture of quicklime, slaked lime, soil conditioner, whiting, whiting material in toothpaste, paint and paper.