Periclase Magnesium Oxide Crystals from Mexico
Natural periclase crystals, consisting of nearly pure magnesium oxide, used in research and refractories. Classified in HTS 2519.90.50.00 as other magnesium oxide, whether or not pure, from mineral sources.
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 geological origin certification to prove natural periclase vs. synthetic
• Declare crystal size/weight; large crystals over 2.5g may need Chapter 71 review if gem-like
• Avoid 'optical element' descriptions per Chapter 25 exclusions for Chapter 90