Know all about Gossan and Slate properties here. All properties of rocks are important as they define the type of rock and its application. Gossan and Slate belong to Metamorphic Rocks.Texture of Gossan is Rough, Sandy whereas that of Slate is Foliated. Gossan appears Dull and Banded and Slate appears Dull. The luster of Gossan is metallic while that of Slate is dull. Gossan is available in brown, brown- black, gold, green, rust colors whereas Slate is available in black, brown, buff, green, light to dark grey, purple, red, shades of blue colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone 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.