Natural White Chalk Lumps
Irregularly shaped lumps of natural calcium carbonate chalk extracted from chalk deposits, used primarily as a raw material for grinding into powder or further processing. Classified under HTS 2509.00.10.00 as crude chalk, unprocessed and not ground or powdered. It remains in its raw, mined form without any refinement.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If artificially activated or quicklime-treated
Processed or calcined chalk falls under artificial chalk heading, not natural crude.
If for bulk road-making or construction aggregate use
Crushed chalk used as pebbles or granules for paving is classified in heading 2517 per chapter note precedence.
If chemically precipitated calcium carbonate
Synthetic or precipitated forms are chemical preparations, excluded from natural mineral chapter.
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Import Tips & Compliance
• Verify geological origin with certificates to confirm natural chalk composition (primarily CaCO3 >95%) and avoid reclassification as synthetic
• Declare as 'crude' only if unground; grinding disqualifies from this heading—common pitfall leading to audits
• Check for impurities; excessive silica may shift to HTS 2517 pebbles if resembling road ballast
Related Products under HTS 2509.00.10.00
French Cretaceous Chalk Chunks
Large, unrefined chunks of soft white chalk from Cretaceous geological formations in northern France, suitable for industrial crushing. Falls under HTS 2509.00.10.00 as crude natural chalk, directly from quarries without sizing or powdering. Ideal for toothpaste, paint, and fertilizer production.
English Dover Chalk Quarry Blocks
Massive quarry blocks of high-purity white chalk from the famous Dover cliffs in England, used in cement and soil amendment industries. HTS 2509.00.10.00 applies to this crude, unground form straight from extraction. Not suitable for immediate consumer use without processing.
Bulgarian Soft Chalk Lumps
Friable, soft lumps of natural chalk from Bulgarian deposits, valued for high whiteness in paper filler applications. Remains crude under HTS 2509.00.10.00 as it's neither powdered nor calcined post-mining. Primarily an intermediate industrial raw material.
High-Purity Chalk Quarry Run
Unscreened quarry run of high-purity natural chalk, direct from blasting operations, for pharmaceutical and food-grade processing. Strictly crude under HTS 2509.00.10.00, with no washing or sizing applied. Meets standards for further refinement into USP-grade calcium carbonate.
U.S. Imported Crude Blackboard Chalk Ore
Raw ore lumps containing natural chalk suitable for blackboard chalk manufacturing, imported in unprocessed state. HTS 2509.00.10.00 covers this crude form before grinding into familiar writing chalk sticks. Excludes finished consumer products.