Polybasite Silver Ore from Mexico
Polybasite ((Ag,Cu)16Sb2S11) is a complex silver copper ore from epithermal deposits with 50-70% Ag equivalent. HTS 2616.10.00 applies as silver-dominant ore. Processed via selective flotation.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Separate copper-silver streams during declaration to prevent dual classification
• Use NIOSH-approved respirators for handling antimony-bearing dust
• File for duty drawback if ore re-exported after processing