Know all about Gossan and Foidolite properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Foidolite belongs to Igneous Rocks.Texture of Gossan is Rough, Sandy whereas that of Foidolite is Earthy. Gossan appears Dull and Banded and Foidolite appears Dull. The luster of Gossan is metallic while that of Foidolite is subvitreous to dull. Gossan is available in brown, brown- black, gold, green, rust colors whereas Foidolite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Foidolite are cemetery markers, commemorative tablets, creating artwork.