Know all about Gossan and Diabase properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Diabase belongs to Igneous Rocks.Texture of Gossan is Rough, Sandy whereas that of Diabase is Aphanitic, Granular. Gossan appears Dull and Banded and Diabase appears Vesicular. The luster of Gossan is metallic while that of Diabase is not available. Gossan is available in brown, brown- black, gold, green, rust colors whereas Diabase is available in dark grey to black colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.