Miners' Type Ia Natural Diamond Rough from China
Rough natural diamonds classified as miners' diamonds, unworked except for simple sawing or cleaving, primarily Type Ia with nitrogen impurities. These fall under HTS 7102.21.10.20 as industrial-use diamonds not mounted or set, distinguished from gem-quality by color and clarity for mining applications. Used in drill bits for oil and gas extraction.
Duty Rate — China → United States
35%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Obtain Kimberley Process Certificate for all rough diamonds to verify conflict-free origin and avoid customs holds
• Provide detailed grading reports specifying industrial quality (e.g
• Type Ia, low clarity) to confirm classification under 7102.21.10.20
• Declare exact weight in carats; misdeclaration of miners' vs gem diamonds can lead to reclassification and penalties