Microcline is a common but not so well known feldspar. It is often used as a semi-precious gemstone under the names amazonite, perthite and some of its other variants, all with their own unique appearance! Is microcline rare or common? It is actually one of the most common feldspar minerals, found in igneous rocks such as granite, syenite and granodiorite. A number of feldspar minerals are rich in potassium (K), which makes them K-feldspars.
