Know all about Minette and Gritstone properties here. All properties of rocks are important as they define the type of rock and its application. Minette belongs to Igneous Rocks while Gritstone belongs to Sedimentary Rocks.Texture of Minette is Porphyritic whereas that of Gritstone is Earthy. Minette appears Dull, Banded and Foilated and Gritstone appears Layered and Foliated. The luster of Minette is subvitreous to dull while that of Gritstone is dull. Minette is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors whereas Gritstone is 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 Minette are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo) and that 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.