Know all about Gossan and Appinite properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Appinite belongs to Igneous Rocks.Texture of Gossan is Rough, Sandy whereas that of Appinite is Porphyritic. Gossan appears Dull and Banded and Appinite appears Dull, Banded and Foilated. The luster of Gossan is metallic while that of Appinite is subvitreous to dull. Gossan is available in brown, brown- black, gold, green, rust colors whereas Appinite is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Appinite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner.