Feldspar is rather considered to come in formation with its own group that's known as Tectossillicate Minerals, which make up 60% of the Earths Crust. In general Feldspar comes in the form of a crystallization that formed by Magma as a vein structure in both Intrusive and Extrusive Igneous Rock formation, that also represent in many different types of Metamorphic Rock. Most of its whole entire formation is formed by Calcic Plagioclase feldspar that identified as Anorthosite. In several case Feldspar comes from the German word Feldspat that means field, and Spat. Its also widely found in the Province of Ontario, Canada.