De Beers pleads guilty to failing to report mercury monitoring results at Victor mine Victor mine was Ontario’s first and only diamond mine and the second De Beers mine in Canada. (Image courtesy of De Beers) In a resolution to a years-long dispute, De Beers Canada has plead guilty to one count of failing to report annual mercury monitoring results for the G2 station at Victor mine in 2014 as required under the mine’s Certificate of Approval. De Beers was not charged with failing to take samples, monitoring or for polluting the environment. Sign Up for the Precious Metals Digest