Feldspar belongs to group of rock-forming tecto-silicate. Earth crust is main component of feldspar. It occurs from intrusive and extrusive igneous rocks. Feldspar is mainly found in granite and pegmatite. It is one of the hard minerals. It is a group of aluminosilicate minerals, contains calcium and sodium or potassium. Sometimes it can be confused with quartz. Feldspar is cleavage minerals, this property is main feature which differentiate it with quartz. Feldspar is the most common mineral on earth
Feldspar is common base raw material of glassmaking, clay and ceramic industry.
Feldspars (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
Feldspars raw crystallize from magma in intrusive and extrusive igneous rocks. Feldspar crystallizes as veins.
Feldspar consists with high amount of mica and iron oxides. Feldspars are alumina silicates soda (sodium oxide), potassium (potassium oxide), or lime (calcium oxide). Feldspar-quartz rocks rich in alkali. Feldspar raw can be categories in three classes: Barium feldspars, Plagioclase feldspars and Alkali feldspars.