Carbonado Diamond Chunks for Drilling from Japan
Rough carbonado chunks selected for high-impact drilling applications in mining operations, valued for their opacity and fracture resistance. HTS 7102.29.00.10 covers these as industrial miners' diamonds specifically carbonados, distinguishing from single-crystal boart. Typically irregular shapes directly from mining sources.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include sieve analysis if processed to confirm 90%+ passes 0.5mm per subheading notes, though carbonados typically qualify as powder form ineligible here
• Avoid common pitfall of declaring as 'black diamonds' without specifying carbonado to prevent scrutiny as semiprecious under 7103
• Bulk import declarations must specify 'industrial use only' to maintain classification separate from jewelry potential