Our piece quartz products used in the fields of Ferrosilicon (Fe-Si), Silicon Metal (Si-Me) and Silico Manganese (Si-Mn) in the metallurgic grade silicon (MG-Si) sector support stable and safe production processes for users with their low aluminium (Al2O3), iron (Fe2O3), titanium (TiO2), phosphor (P2O5) and boron (B2O3) impurities and high level of silicon (SiO2) purity (>99.5% min.), thermal stability index (TSI) and heat index (HI).