Feldspar

Feldspar is a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks.

Percentage: MgO 40 to 46%

Size: 0-1mm, 1-3mm, 1-4mm, 1-5mm, 1-6mm, 1-8mm and can be given as per the request till 300 mesh