china to slap tariffs on rock exports again

... last time the world's largest producer of rock did this prices rallied significantly.

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China to levy low tariffs on 600 more goods

BEIJING -- China is to impose temporarily low import tariffs on more than 600 energy and resource-consuming commodities next year, in a bid to promote domestic economic restructuring and resource conservation, the Ministry of Finance (MOF) announced Tuesday. The targeted commodities comprise resource commodities, including coal, granite, and phosphate ore; key components for optic communications; medical products, including plasma and vaccine; and some advanced production machines, the MOF said in the statement. It did not specify the duration and tariff rates.

http://www.chinapost.com.tw/business/asia/b-china/2009/12/16/236799/China-to.htm