Description

Feldspars are a group of rock-forming tectosilicate group of minerals containing potassium, sodium, calcium and aluminium silicatesminerals that make up as much as 60% of the Earth’s crust.  They are the most common rock-forming minerals. Feldspars crystallize from magma as veins in both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Feldspars are also found in many types of sedimentary rock.