Know all about Foidolite and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Foidolite belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks.Texture of Foidolite is Earthy whereas that of Chalk is Clastic or Non-Clastic. Foidolite appears Dull and Chalk appears Soft. The luster of Foidolite is subvitreous to dull while that of Chalk is dull. Foidolite is available in black, brown, colourless, green, grey, pink, white colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Foidolite are cemetery markers, commemorative tablets, creating artwork 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.