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