Variolite is one of the important type of rocks. If we have to define Variolite in general, Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. Variolite comes under Igneous Rocks. All Igneous Rocks have similar properties and formation process. Along with Variolite Definition, know more about the History of Variolite, Etymology of Variolite in next sections.