Miners' Type Ia Natural Diamond Rough
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If simply sawn, cleaved, or bruted beyond basic shape
Diamonds with more advanced working like bruting move from unworked subheading to simply worked category.
If gem-quality rather than industrial miners' grade
High-clarity, colorless diamonds for jewelry are classified separately from industrial miners' diamonds.
If synthetic rather than natural origin
Lab-grown industrial diamonds fall under Chapter 71 synthetic stones heading, not natural diamonds.
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Import Tips & Compliance
• 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
Related Products under HTS 7102.21.10.20
Rough Miners' Diamonds for PDC Drill Bits
Unworked miners' diamonds selected for polycrystalline diamond compact (PDC) cutting tools in drilling operations. HTS 7102.21.10.20 applies to these simply cleaved natural diamonds unsuitable for gem use due to inclusions and color. Essential for high-pressure oilfield drilling equipment.
Cleaved Industrial Miners' Diamonds 3-5 Carat
Natural rough diamonds from mining operations, simply cleaved into 3-5 carat pieces for industrial saw blades and grinding wheels. Classified under 7102.21.10.20 as unworked miners' diamonds, not suitable for jewelry due to industrial grade imperfections. Key component in geological exploration tools.
Sawn Miners' Diamonds for Diamond Wire Sawing
Simply sawn miners' diamonds prepared for embedding in diamond wire used in stone cutting and semiconductor slicing. These industrial rough diamonds under HTS 7102.21.10.20 feature the required toughness but lack gem transparency. Critical for marble quarrying and silicon wafer production.
Bruted Miners' Diamonds Industrial Grade
Rough diamonds from miners' parcels that have undergone simple bruting (girder shaping) for dressing tools and abrasives. HTS 7102.21.10.20 covers these as 'other' unworked industrial diamonds not mounted, valued for hardness over clarity. Used in surface grinding and lapping operations.