Raw Carbonado Rough Stones
Raw carbonado rough stones are unprocessed polycrystalline diamonds extracted from alluvial deposits, featuring their characteristic black, opaque appearance. Classified under HTS 7102.21.10.10 as miner's carbonados, they are industrial-grade and not suitable for jewelry due to impurities. Ideal for further processing into abrasives or high-pressure tools.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If graded as grit or dust approximating powder form
Powder form (90% through 0.5mm sieve) shifts to specific grit subheading.
If synthetic polycrystalline rather than natural carbonado
Synthetic diamonds, even polycrystalline, classify under Chapter 71 heading for synthetics.
If cut and polished for industrial display or collection
Worked beyond simple sawn into articles of precious stones moves to heading 7115.
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Import Tips & Compliance
• Include geological reports specifying carbonado type to distinguish from synthetic polycrystalline diamonds
• Ensure CITES compliance if sourced from regions with export restrictions on natural diamonds
• Avoid common pitfall of undervaluation; carbonados command premium pricing despite industrial grade
Related Products under HTS 7102.21.10.10
Natural Carbonado Diamond
Carbonado diamonds are a rare polycrystalline form of diamond known as black diamonds, used primarily in industrial applications due to their extreme toughness and opacity. They fall under HTS 7102.21.10.10 as unworked or simply sawn, cleaved, or bruted miner's diamonds specifically classified as carbonados. These are not gem-quality diamonds but valued for their durability in cutting tools and drilling.
Carbonado Miner's Diamonds
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.
Black Carbonado Diamond Crystals
Black carbonado diamond crystals are porous, aggregate diamond formations prized for their impact resistance in industrial drilling. They qualify under HTS 7102.21.10.10 as unworked miner's carbonados, not mounted or set. Primarily sourced from Brazil or Central Africa.