
Cryolite: Mineral information, data and localities.
ⓘ Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Fjord, Sermersooq, Greenland, Denmark. A curiosity mineral. Colourless samples of this sodiumaluminiumfluoride mineral seemingly disappear in water due to the proximity of their refractive indices.