Black Carbonado Aggregates from Canada
Black carbonado diamond aggregates, known as black diamonds in mining circles, used exclusively for high-pressure industrial cutting and grinding. Under HTS 7102.29.00.10 as carbonados, these porous diamond masses exceed 2% carbon purity but lack gem brilliance. Sourced primarily from Brazil and Central Africa.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Require X-ray diffraction certificates proving polycrystalline diamond structure to distinguish from graphite or other carbon forms
• Declare exact parcel weights; carbonados often imported in 1-10 carat miner parcels prone to undervaluation scrutiny
• Note Brazilian origin quotas may apply; verify CITES compliance though carbonado exempt from diamond trade controls