Picrite is one of the important type of rocks. If we have to define Picrite in general, Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. Picrite comes under Igneous Rocks. All Igneous Rocks have similar properties and formation process. Along with Picrite Definition, know more about the History of Picrite, Etymology of Picrite in next sections.