Sodium aluminum fluoride, typically white or colorless, with a refractive index close to water, giving it an icy appearance. Historically used in aluminum production. It's associated with spiritual insight and clear communication.
Colorless, White, Snow-White, sometimes Blackish or Reddish, (Historically important in aluminum extraction)
Cryolite is classified as a halide mineral mineral which typically crystallizes in the monoclinic system. Its chemical formula is Na3AlF6. Common crystal habits include usually massive, coarsely granular. the rare crystals are equant and pseudocubic.