Know all about Slate and Minette properties here. All properties of rocks are important as they define the type of rock and its application. Slate belongs to Metamorphic Rocks while Minette belongs to Igneous Rocks.Texture of Slate is Foliated whereas that of Minette is Porphyritic. Slate appears Dull and Minette appears Dull, Banded and Foilated. The luster of Slate is dull while that of Minette is subvitreous to dull. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Minette is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors. The commercial uses of Slate are blackboards, commemorative tablets, laboratory bench tops, standard material for the bed of billiard table, standard material for the beds of pool and snooker table, tombstones, used in aquariums, writing slates and that 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).