BHP Billiton is the only diamond mining company in the world that guarantees the origin of polished diamonds produced from its mine.

Every CanadaMark™ diamond is monitored from the rough crystal through to the finished polished diamond, creating an unbroken chain. The unique serial number carried by each CanadaMark™ diamond is laser engraved on the girdle of the diamond and shown on the diamond's certificate card. If you have purchased a CanadaMark™ diamond you may verify the unique tracking number. See the verification page.