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.
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 but not classified as miner's carbonados
Other industrial unworked diamonds excluding specific miner's carbonados fall under the broader category.
If processed beyond simply sawn, cleaved, or bruted
Diamonds worked beyond simple brute fall into the worked industrial category.
If already incorporated into industrial tools or drill bits
When assembled into finished interchangeable tools, classification shifts to Chapter 82 for tooling.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify authenticity with GIA or similar certification to confirm carbonado classification and avoid gem diamond scrutiny
• Provide detailed documentation on origin and processing level (unworked/sawn) to prevent misclassification as worked diamonds
• Declare exact weight and sieve test if powdered form approaches subheading thresholds for powder definitions
Related Products under HTS 7102.21.10.10
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.
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.