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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cleaved/bruted but exceeding miner's carbonado specifications
Other simply sawn industrial diamonds have separate subheadings.
If set into jewelry despite industrial grade
Mounting or setting moves to articles of precious stones per chapter notes.
If for use in saw blades as interchangeable tool bits
Finished saw tool classification supersedes raw material under tooling headings.
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
• Conduct sieve analysis if fragmented to confirm not in powder form per subheading note
• Maintain chain-of-custody records from mine to avoid conflict diamond allegations
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.
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.