Cryolite, Pieces, 99.96%, 3 -6 mm

Used as a flux in the smelting of aluminum to lower the melting point of the oxide ore and improve the efficiency of the electrolytic process.

Utilized as a low-refractive index material in the production of multilayer optical coatings and thin films.

Used as a source material for thermal evaporation to create protective or antireflective coatings on glass and optical components.