Know all about Nephelinite and Slate properties here. All properties of rocks are important as they define the type of rock and its application. Nephelinite belongs to Igneous Rocks while Slate belongs to Metamorphic Rocks.Texture of Nephelinite is Aphanitic whereas that of Slate is Foliated. Nephelinite appears Skeletal and Slate appears Dull. The luster of Nephelinite is vitreous to metallic while that of Slate is dull. Nephelinite is available in black, brown, colourless, green, grey, white colors whereas Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. The commercial uses of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo) and that 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.