Fused Silica comes in various grades that differ in their purity, homogeneity, and optical clarity. These grades determine the suitability of the Fused Silica for different applications. For instance, high-grade synthetic Fused Silica is often used in industries like semiconductor manufacturing and optics where extreme precision is required. In contrast, lower grade Fused Silica, while still having excellent thermal properties, may be used in applications where high optical clarity is less crucial.