Raw Carbonado Diamond
Carbonado diamonds are polycrystalline, non-crystalline aggregates of diamond primarily used in industrial applications due to their extreme toughness and resistance to fracturing. Classified under HTS 7102.29.00.10 as miners' diamonds specifically carbonados, they are unworked or roughly shaped for mining and drilling tools. Their black, porous appearance distinguishes them from gem-quality diamonds.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | +35.0% | 35% |
| 🇲🇽Mexico | Free | +10.0% | 10% |
| 🇨🇦Canada | Free | +10.0% | 10% |
| 🇩🇪Germany | Free | +10.0% | 10% |
| 🇯🇵Japan | Free | +10.0% | 10% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If synthetic or lab-grown polycrystalline
Artificial diamonds, including lab-created carbonado-like polycrystalline forms, fall under Chapter 71 heading 7104 for synthetic stones.
If Interchangeable tools incorporating carbonado diamonds like drill bits.
Finished mining drill bits or tools with diamond inserts classify as interchangeable tools in Chapter 82, not raw diamonds.
If processed beyond rough for industrial use but still unmounted
Worked industrial diamonds (sawn, shaped beyond rough) move to 7102.31, while carbonados as miners' diamonds remain unworked.
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Import Tips & Compliance
• Verify authenticity through gemological certification to confirm carbonado structure and avoid misclassification as synthetic diamonds under 7104
• Provide mining origin documentation as carbonados are natural 'miners' diamonds' excluding lab-grown polycrystalline diamonds
• Ensure proper declaration of weight in carats; carbonados often sold in bulk for industrial processing
Related Products under HTS 7102.29.00.10
Carbonado Diamond Chunks for Drilling
Rough carbonado chunks selected for high-impact drilling applications in mining operations, valued for their opacity and fracture resistance. HTS 7102.29.00.10 covers these as industrial miners' diamonds specifically carbonados, distinguishing from single-crystal boart. Typically irregular shapes directly from mining sources.
Black Carbonado Aggregates
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.
Carbonado Diamond Powder Precursor
Large carbonado fragments awaiting crushing into industrial diamond powder for wire sawing applications. HTS 7102.29.00.10 specifies these miners' carbonados before powder form (90% through 0.5mm sieve per subheading note). Essential precursor for semiconductor and geological sawing.