Bastnäsite ore is typically used to produce rare-earth metals. The following steps and process flow diagram detail the rare-earth-metal extraction process from the ore. After extraction, bastnasite ore is typically used in this process, with an average of 7% REO rare-earth oxides .
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Due to a limited number of such sulfur deposits and the high cost of working them, this process for mining sulfur has not been employed in a major way anywhere in the world since 2002. 59 60 Today, sulfur is produced from petroleum, natural gas , and related fossil resources, from which it is obtained mainly as hydrogen sulfide .
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