PROCESS FOR MANUFACTURING A NATURAL NON-TRANSPARENT QUARTZ PRODUCT, PROCESS TO PRODUCE A PURE QUARTZ GLASS MOLDED BODY AND PROCESS FOR THE PRODUCTION OF PIEZOELETRIC CRYSTALS

摘要

A process is described for manufacturing a product from natural non-transparent quartz (milky quartz), this product being suitable for producing pure quartz glass, as well as a process for processing this product further to produce a shaped body made of pure quartz glass. It is also set forth that this product is suitable as a starting material for growing piezoelectric crystals in an autoclave.