Gemfields Kagem Mine Posts Stong Gains

Miners at the Kagem emerald mine in Zambia. Photo credit: Gemfields

Mining company Gemfields has reported record annual production from its emerald mine in Zambia with a jump in grades per ton and a cut in production costs.

In an operational update for its fourth quarter and full year to June 2011, the company says annual production increased 90 percent to 33 million carats versus the