Marcasite Iron Pyrite Crystals from Mexico
Natural marcasite variety of unroasted iron pyrites (FeS2) in crystalline form, valued for both industrial sulfur source and collector specimens. Falls under HTS 2502.00.00.00 as unroasted iron pyrites regardless of crystal structure. Used in pyrotechnics and as specimen mineral.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include XRF analysis confirming FeS2 composition to differentiate from similar-looking metallic minerals
• For collector specimens, provide certificates of authenticity to avoid gemstone misclassification
• Declare crystal size and purity level; larger pure crystals may face different valuation methods