Greenstone Gold Mines is a 50/50 partnership between Centerra Gold Inc. and Premier Gold Mines Limited for the joint ownership and development of the Hardrock, Brookbank and Viper Properties.

The properties located in the Geraldton-Beardmore Greenstone Belt in Ontario, Canada are made up of several claim groups having a cumulative length of more than 105 kilometers of the district's most prospective geological structures. With access to ideal infrastructure that includes the Trans-Canada Highway (Canada's national highway) and the Trans-Canada natural gas pipeline extending along its length, Greenstone Gold Mines’ objective is to become a gold producer, focused on the environment and social responsibility.