Know all about Slate and Borolanite properties here. All properties of rocks are important as they define the type of rock and its application. Slate belongs to Metamorphic Rocks while Borolanite belongs to Igneous Rocks.Texture of Slate is Foliated whereas that of Borolanite is Granular. Slate appears Dull and Borolanite appears Banded and Foilated. The luster of Slate is dull while that of Borolanite is greasy to dull. Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors whereas Borolanite is available in brown, buff, cream, green, grey, pink, white 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 Borolanite are cemetery markers.