Know all about Gossan and Hawaiite properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Hawaiite belongs to Igneous Rocks.Texture of Gossan is Rough, Sandy whereas that of Hawaiite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Gossan appears Dull and Banded and Hawaiite appears Dull and Soft. The luster of Gossan is metallic while that of Hawaiite is not available. Gossan is available in brown, brown- black, gold, green, rust colors whereas Hawaiite is available in black, brown, light to dark grey colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Hawaiite are creating artwork, sea defence.