Know all about Gritstone and Trondhjemite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Trondhjemite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Trondhjemite is Phaneritic. Gritstone appears Layered and Foliated and Trondhjemite appears Banded and Foilated. The luster of Gritstone is dull while that of Trondhjemite is subvitreous to dull. Gritstone and Trondhjemite are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones and that of Trondhjemite are cemetery markers, creating artwork.