Fused quartz is the purest form of glass, it contains above 99,95% of silicon dioxide (SiO2). This specific composition gives outstanding properties to this material. Saint-Gobain Quartz is exclusively using natural Quartz which can be extracted at high purity only from a very limited number of mines on Earth. Our know-how is to process this highly particular material into various forms without altering its original properties. For instance, we are able to process it into: yarn, roving, felt or wool. Further details regarding these particular products can be found in our technical datasheets.