Meanwhile, amid rising costs and environmental concerns elsewhere, output of rare earths outside China slumped from 42,000 metric tons in 1995, or nearly 60% of global production, to virtually nothing.

Just one rare-earth metal lanthanum oxide, which is used for applications such as polishing glass, shot up to more than $110 per kilogram in the second half of 2011 from an average of $4.88 in 2009, up nearly 2100%.

Molycorp Inc. of the U.S. continues to increase production at a California mine that was once the world’s largest, which it estimates has more than 20 million tons of ore.

The importance of rare earths to China is reflected in a saying attributed to the late Chinese leader Deng Xiaoping in 1992: “There is oil in the Middle East, there is rare earth in China.” In an effort to take a greater role in the market, it boosted annual output more than fourfold between 1995 and 2010 to 130,000 metric tons, according to the U.S. Geological Survey.

China now has a monopoly on its production.

References: http://minerals.usgs.gov/minerals/pubs/commodity/rare_earths/

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