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TIGHTENING CONTROLS: China's Ministry of Land and Resources cut the number of permits for rare earths mining by 40 percent.
EXOTIC MINERALS: The move tightens controls over the 17 exotic minerals needed to manufacture mobile phones, hybrid cars, weapons, flat-screen TVs, mobile phones, mercury-vapor lights, camera lenses and other high-tech goods. China has about 30 percent of world supplies of rare earths but accounts for more than 90 percent of production.
PRODUCTION IMPACT UNCLEAR: A report on China Central Television gave no indication how the cut was expected to affect the amount of rare earths produced.