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.
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 gem-quality unsorted diamonds
Unsorted diamonds potentially containing carbonado but including gem rough classify under 7102.21, not specific industrial carbonado.
If manufactured into millstones or grinding wheels
Carbonado aggregates formed into finished grinding wheels classify under Chapter 68 as worked stone articles.
If misdeclared as natural graphite
Poorly documented black carbonados resembling graphite may incorrectly classify under Chapter 25 minerals.
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Import Tips & Compliance
• 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
Related Products under HTS 7102.29.00.10
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.
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.
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.