Mica Sheet for specialization applications can sell for costs around $2000 per kilogram. China mica powder has many properties which make it appropriate for very special applications:
1) it could be split into thin sheets.
2) it's stable when exposed to light, electricity, moisture and extreme temperatures.
3) Most Muscovite Mica Sheet is used to create digital devices. In these applications the sheets have been cut, punched, stamped and machined to precision measurements. Software include: diaphragms for oxygen breathing gear, markers dials for navigation compasses, optical filters, pyrometers, retardation plates in helium-neon lasers, missile systems elements, medical electronic equipment, optical instrumentation, radar systems, radiation sensor windows, along with calibrated capacitors.