Mining Dore Bullion from Polymetallic Ores
Dore produced from polymetallic sulfide ores via cyanidation, containing 75% silver, 20% gold, and trace metals in bar form. HTS 7106.91.10.20 applies to this unwrought silver-dominant dore for import by U.S. refineries. Represents intermediate stage post-smelting.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in powder form passing 0.5mm sieve
Per subheading note, silver powder (90% through 0.5mm mesh) classified separately from unwrought bars or ingots.
If still containing significant base metal sulfides
Unroasted antimony ores/concentrates with silver by-product stay in Chapter 26 until smelted to dore.
If from gold-dominant deposits like Witwatersrand
If gold weight exceeds silver, reclassified as unwrought gold per alloy predominance rules in Note 5.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide smelter certificates detailing extraction method; distinguishes dore from ore concentrates
• Monitor impurity levels (e.g
• lead, copper) for hazardous material declarations
Related Products under HTS 7106.91.10.20
Gold-Silver Dore Bars
Dore bars are semi-refined bullion containing a mixture of gold and silver, typically produced from mining operations before full separation. Classified under HTS 7106.91.10.20 as unwrought silver dore, where silver is the predominant precious metal by weight per Chapter 71 Note 5 rules. These impure bars require further refining to separate the metals.
Unrefined Silver Dore Ingots
Impure ingots from primary silver mining, assaying 70-80% silver with gold impurities, in unwrought form ready for electrolytic refining. Fits HTS 7106.91.10.20 as dore bullion where silver predominates. Not suitable for fabrication without purification.
Electrowinning Silver Dore Bars
Dore bars from electrowinning cells in silver heap leach operations, impure with 80% Ag and 15% Au. Unwrought form under HTS 7106.91.10.20 due to silver predominance and lack of full refinement. Used by mints and refiners.
Bolivian Potosi Silver Dore
Traditional dore from Potosi mines, high-grade silver (85% Ag) with doré characteristics from amalgamation. Unwrought silver bullion under HTS 7106.91.10.20. Historic import source for U.S. refineries.
Heap Leach Silver Dore Pours
Poured dore from cyanide heap leaching of silver oxides, 72% Ag. Meets unwrought dore criteria for 7106.91.10.20.
Miller Process Silver Dore
Partially refined dore from Miller chlorination, impure silver phase. HTS 7106.91.10.20 as unwrought.