Gold slumped as much as 2.6 percent to $802.34 an ounce, the lowest since Dec. 21, and 22 percent below its March 17 record of $1,032.70 an ounce. Platinum fell as much as 3.4 percent and silver 4.5 percent.
Gold stocks fell. Shares of Zhongjin Gold Corp., China's second-largest producer, dropped as much as 9.3 percent. The metal declined for a fourth day and traded at $805.48 an ounce at 10:53 a.m. in Singapore. Platinum traded at $1,479 and silver at $14.12 an ounce.
Bullion for December delivery on the Shanghai Futures Exchange fell by the exchange-imposed 5 percent daily limit to 182.82 yuan a gram ($828 an ounce). That's the lowest for a most-active contract since the exchange started trading gold futures in January.
The slump in gold triggered a tumble in related equities in China. Zijin Mining Group Co., which owns the country's largest gold mine, fell for a ninth trading day by as much as 4.6 percent to 5.18 yuan in Shanghai, the lowest since its debut.