Reuters Africa reports that copper rose 2 percent at a three-week high.

SRK Consulting has opened a practice in Ghana’s capital, Accra. This follows several decades of involvement in West Africa and will consolidate SRK’s position in the region.

Caterpillar Inc. on Aug. 24 announced an expansion of the company’s operations in China in what the company says is in support of the company’s strategy to grow its business to a leadership position in China.

Interfax reports Russia state-owned diamond miner Alrosa is up 22% on the country's trading board for unlisted stocks since it was first quoted there on July 18. The price of US$31,495 per share, implies a market value of $8.6 billion. Alrosa accounts for around 25% of world output and for the full year sales of $4.7 billion is expected. The secretive firm has been feeding the market more information recently in anticipation of a 2012 public offering that seeks to raise up to $3 billion.

Every day up to 400 trucks leave the coal stockpile Kohlenhuck of Deutsche Steinkohle in Kamp-Lintfort, Germany. A special FRUTIGER De-Mucking System washes the trucks before they enter the public road.

24/7 Wall St says the global diamond mining industry may be one of the world’s best-kept secrets and diamond mining is not unlike the oil business, where about 100 massive fields supply about half the world’s oil.

Gold for December delivery fell more than $50 to $1,710 an ounce in afternoon trade in London on Thursday, bring its losses since the record high of Monday to 10%, the worst slump since March 2008. On Wednesday, the Chicago stock exchange operator CME followed a move by the Shanghai Gold Exchange by increasing the margin requirement as a way to “ensure adequate collateral coverage.” The minimum cash deposit to borrow from brokers to trade gold futures will rise 27% to $9,450 per 100-ounce contract at the end of today. Silver slumped as much as 35% in London in about three weeks from its April 25 record of $49.79 an ounce after CME announced margin increases.

South Africa's Impala Platinum Holdings (Implats) said on Thursday that its headline earnings for the 2011 financial year rose 41% as it reaped the benefit of rising prices. The world's second-largest producer of the metal also said Thursday that it expects output in 2012 to be steady or slightly lower on the year and that costs will likely rise. Implats accounts for close to 30% of global supply of the precious metal sometimes referred to as white gold, used in vehicle emission systems to reduce pollution and for the manufacture of jewellery. Prices for platinum climbed throughout the year from just over US$1,500 per ounce to end at about US$1,800 per ounce.

The U.S. State Department's final environmental review of a proposed Canada-to-Texas oil pipeline will affirm an earlier finding that the project will have "limited adverse environmental impacts," The Washington Post reported on Wednesday.