Quartz, fused silica or quartz glass is a glass consisting of almost pure silica in amorphous form. This differs from all other commercial glasses in which other ingredients are added which change the glass optical and physical properties, such as lowering the melt temperature. Fused quartz, therefore, has high working and melting temperatures.Quartz-glassware Manufacturers, Quartz-glassware Suppliers, Quartz-glassware Exporters in India, Quartz-glassware Manufacturers in India.