Foidolite is one of the important type of rocks. If we have to define Foidolite in general, Foidolite is a rare type of coarse-grained intrusive igneous rock with a feldspathoid mineral content greater than 60%. Foidolite comes under Igneous Rocks. All Igneous Rocks have similar properties and formation process. Along with Foidolite Definition, know more about the History of Foidolite, Etymology of Foidolite in next sections.