The Diavik mine is Canada´s largest diamond mine, located on a 20 km2 island in Lac de Gras, Northwest Territories, approximately 300 km from Yellowknife. Access to the mine is by air year-round and by a 425 km ice road in winter that operates for eight to ten weeks between January and March. Four diamond bearing kimberlite pipes are located just off the eastern shore of the island and although the pipes are relatively small, each having surface expressions less than 200 metres in diameter, they are high grade making Diavik one of the most profitable diamond mines in the world. The majority of Diavik´s products are gem-quality white stones, which are sold to select diamontaires.
Diavik began producing diamonds in January 2003, and has since produced more than 100 million carats of high quality rough diamonds from the A154 South, A154 North and A418 pipes. Open pit mining from the three pipes has concluded and the ore bodies are currently being mined from underground. Rio Tinto is developing a fourth pipe (A21) which requires the construction of a rockfill dike. Diavik´s current mine plan has production continuing to 2025. The Proven and Probable Mineral Reserve at Diavik consists of 16.3 Mt at 2.8 cpt for a total of 46 million carats as of Dec. 31, 2016 (1 mm cut-off).
Production at Diavik has totaled more than 5.7 million carats in the first 9 months of 2017.
The development of the A21 pipe is progressing on time and is expected to ensure the continuation of existing production levels. First carats are expected to be extracted in mid-2018.