Optically, Crystalline Quartz is used extensively as a wave retardation medium. The birefringent properties of Quartz are of use in quarter-wave plates and in polarisers. Quartz should not be processed or used at temperatures greater than 490 °C
Crystalline quartz is also used for electronic filters and resonators. However, Crystran Ltd. does not deal in material for this application.
Visit the Crystran Ltd website for more information on Quartz Crystal (SiO2)