Know all about Blueschist and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Blueschist belongs to Metamorphic Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Blueschist is Foliated whereas that of Siltstone is Clastic. Blueschist appears Dull and Banded and Siltstone appears Rough. The luster of Blueschist and Siltstone is dull. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.