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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ground, molded, and packaged as writing chalk
Chapter exclusion sends finished chalks to pencils/drawing materials heading.
If primarily kaolin clay impurities
High clay content shifts to kaolin heading 2507.
If pre-mixed dolomite ramming for furnaces
Chapter exclusion to 3816 for specific industrial mixes.
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
• Distinguish from finished chalk (9609); provide processing plant affidavits proving crude intent
• ADA import declarations required for mineral dust hazards
Related Products under HTS 2509.00.10.00
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.
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.