Know all about Variolite and Gabbro properties here. All properties of rocks are important as they define the type of rock and its application. Variolite and Gabbro belong to Igneous Rocks.Texture of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Gabbro is Phaneritic. Variolite appears Dull and Soft and Gabbro appears Veined and Shiny. The luster of Variolite and Gabbro is not available. Variolite is available in black, brown, light to dark grey colors whereas Gabbro is available in dark grey to black colors. The commercial uses of Variolite are cemetery markers, creating artwork and that of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.