C.E.D. Cristobalite is synthesized from high purity quartz using a proprietary solid state, high heat manufacturing process. As such, not all synthetic Cristobalite products are created equal. Some products are partially converted to Cristobalite and therefore contain substantial amounts of quartz and glass. Other products are manufactured using mineralizers that can affect physical and chemical properties. C.E.D. Process Minerals C-1 Cristobalite is fully converted without the use of mineralizers.