FGQuartz manufactures ultra-pure quartz glass with 99.99% SiO2 purity. Our advanced manufacturing processes ensure minimal impurities, making our products ideal for semiconductor processing, optical fiber production, and high-precision laboratory applications where material purity is critical. We use premium natural quartz crystals as raw material and employ multi-stage purification during the fusion process. Typical impurity levels are: Al < 10 ppm, Fe < 5 ppm, Na < 3 ppm, K < 2 ppm, with total metallic impurities < 20 ppm.