Is fused quartz the same as quartz glass?

Yes—”fused quartz”, “quartz glass”, and “fused silica glass” are often used interchangeably in industry. They refer to high-purity amorphous SiO₂ material with exceptional thermal, optical, and chemical properties. At FGQuartz, our quartz glass products are engineered for semiconductor fabs, optical systems, and high-temperature processes worldwide.