Know all about Siltstone and Talc carbonate properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Talc carbonate belongs to Metamorphic Rocks.Texture of Siltstone is Clastic whereas that of Talc carbonate is Very Soft. Siltstone appears Rough and Talc carbonate appears Soft. The luster of Siltstone is dull while that of Talc carbonate is pearly. Siltstone is available in brown, red, reddish brown colors whereas Talc carbonate is available in colourless, grey, white colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Talc carbonate are manufacturing of baby powder.