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1.77 US $ per kg
Cerium is one of the most abundant rare-earth metals . We can find enormous deposits of cerium in India , Brazil , and Southern California , U . S .
As a component of mischmetal , cerium is used to manufacture cigarette and gas lighters alloys . Cerium oxide is used for producing incandescent gas mantles and as a catalyst in selfcleaning ovens . Cerium is also in the carbon arc lighting for studio lighting and projector lights used in the film and television industry .
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4.13 US $ per kg
Yttrium gained prominence in the past few decades as an indispensable rare earth metal used in computer technology , energy , medicine , and other fields . China , Russia , India , Malaysia , and Australia are the leading producers of Yttrium .
Yttrium is used to produce phosphorus used for cell phones . Before then , it was used for colour television sets . Yttrium element is contained in the ceramics composition used in electronics , thermal barrier coatings for jet engines , and medical implants . Yttrium iron garnets are used for microwave filters and in radar and communication technology .
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