HPHT Single Crystal Diamond Boulders from Canada
Large synthetic single-crystal diamonds grown by high-pressure high-temperature method for industrial sawing/wire drawing dies. Unmounted and worked falls under 7102.29.00 as non-gem industrial diamonds. Typically yellow/brown coloration unsuitable for jewelry.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include growth method certification (HPHT vs CVD); declare industrial color grade
• Avoid 'gem-quality' language in documentation
• Provide end-use verification for tooling applications