Teschenite is one of the important type of rocks. If we have to define Teschenite in general, Teschenite is coarse- to fine-grained, dark-coloured intrusive igneous rock that usually occurs in sills, dikes and irregular masses and is always altered to some extent. Teschenite comes under Igneous Rocks. All Igneous Rocks have similar properties and formation process. Along with Teschenite Definition, know more about the History of Teschenite, Etymology of Teschenite in next sections.