Cryolite is the chief ore of aluminium.
What is an ore?
Ore is defined as an economic concentration of minerals. The earthy substance associated with ores is called gangue. The richness of ores can be vastly different, depending on the minerals and elements involved. Earth is the main source of minerals and ores. There are mainly four types of ores such as Oxides; Carbonate Ores; Sulphide, Halides Ores. Like Bauxite (Al2O3.2H2O) is the ore of Aluminium which contains 50% to 70% of Aluminium Oxide.