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