Proustite Silver Ore from Mexico
Proustite (Ag3AsS3) is a silver sulfosalt ore from low-temperature veins, assaying around 60% silver. Falls under HTS 2616.10.00 as silver concentrate precursor. Flotation and roasting recover silver from arsenic-bearing matrix.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Include MSDS sheets for arsenic content; follow DOT hazardous material shipping rules
• Verify origin certificates to claim preferential tariff treatments under USMCA
• Conduct pre-shipment sampling to match declared assay with customs inspection