About | Feldspars are a group of rock-forming aluminum tectosilicate minerals, containing sodium, calcium, potassium, or barium. The most common members of the feldspar group are the plagioclase (sodium-calcium) feldspars and the alkali (potassium-sodium) feldspars. Feldspars make up about 60% of the Earth's crust, and 41% of the Earth's continental crust by weight. Feldspar is found in Igneous, Metamorphic and Sedimentary rocks. |
Color | White, pink, brown. |
Varieties | Potassium Feldspar and Sodium Feldspar. |
Forms | Lumps, Powder and Granules |