Shares of world's top producer falls to 1990 levels while most valuable gold mining stock Goldcorp tumbles to decade low.

A day after reporting a significant jump in the number of pipeline failures, the Alberta Energy Regulator is now investigating one of the biggest ruptures in the province in years.

The star of the show was a 341.9 carat diamond —unveiled in April —, which sold for $20.55 million

China says its gold reserves increased 57%, which makes it the country with the sixth-largest hoard of the precious metal.

On the New York Stock Exchange margin debt has hit all-time records at $500bn, roughly double that at the top of the dot-com bubble in 2000 when valuations rose to the highest ever recorded.

Lake Shore Gold trumps earlier offer for Temex Resources and its flagship Whitney project in northeastern Ontario.

When addressing the operating costs of a modern heavy industrial production facility, most industrial processes will involve electric motors and all will need the services of a generator, either directly on site or indirectly through the electricity supplier. Prolonging the service life of these vital pieces of equipment can deliver significant improvements in their life cycle cost as well as operational savings for the production facility.

Improving the energy efficiency ratings of electric motors is a worldwide goal, but exemptions in the regulations mean that for applications in potentially explosive atmospheres there is no obligation to implement the latest technology.

Canadian mine takes top honours but Russia and USA dominate the rankings.