Know all about Granophyre and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Granophyre belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Granophyre is Granophyric whereas that of Siltstone is Clastic. Granophyre appears Veined or Pebbled and Siltstone appears Rough. The luster of Granophyre is dull to grainy with sporadic parts pearly and vitreous while that of Siltstone is dull. Granophyre is available in black, grey, orange, pink, white colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Granophyre are curling, gemstone, laboratory bench tops, tombstones and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.