Mining Dore Bullion from Polymetallic Ores from United States
Unwrought dore bullion extracted from polymetallic sulfide ores via cyanidation, containing approximately 75% silver, 20% gold, and trace metals in cast bar form. This silver-dominant dore is intended for refining and qualifies as unwrought silver under tariff item 7106.91.00, provided silver predominates by weight.
Duty Rate — United States → Canada
Import Tips
• Obtain a certified assay from an accredited laboratory to confirm the silver content and demonstrate that silver predominates over gold and other metals
• The CBSA may require a commercial invoice and packing list detailing the dore's weight and value; ensure these are consistent with the assay
• If the gold content approaches 20%, consult a customs broker to confirm whether the product might be better classified as gold dore under heading 7108