Feldspar rich in sodium is used for glazes. A type of feldspar contains less quartz and turns the glaze into a matte.Chemical formula: K2O3NA2O4Al2O9SiO2A quantity of 1 kilo. nepheline syaniteSKU: נפלין₪39.00PriceExcluding VAT | משלוח או איסוף עצמיQuantity*Add to CartBuy Now