Carbonado Miner's Diamonds from Japan
Carbonado miner's diamonds are specifically the toughest natural diamond variant used by miners for drill crowns and saw blades. HTS 7102.21.10.10 covers these unworked or simply processed carbonados, distinguishing them from gem-quality or other industrial diamonds. Their unique structure resists fracturing under extreme conditions.
Duty Rate — Japan → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Use Kimberley Process documentation even for industrial diamonds to expedite customs clearance
• Label parcels clearly as 'industrial carbonado - not for jewelry' to prevent reclassification
• Watch for alloy contamination that might trigger precious metal alloy rules under chapter note 5