Natural Chalk Lumps
Rough, unprocessed lumps of natural calcium carbonate chalk mined from chalk deposits, used primarily as a raw material for industrial grinding and processing. This falls under HTS 2509.00.20.00 as 'other' natural chalk, excluding chalk for writing, drawing, or tailors' use as per Chapter 25 notes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing micaceous iron oxides or mixed earth colors
Natural micaceous iron oxides or mixed earth colors fall under heading 2530 per chapter notes, taking precedence over chalk classification.
If in pebbles, gravel, or crushed forms for ballast or road aggregate
Chapter note prioritizes classification in 2517 for any products classifiable there, such as processed chalk used as aggregate.
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Import Tips & Compliance
• Verify purity through lab testing to confirm natural origin and avoid reclassification as synthetic chalk; provide geological source documentation; watch for contamination that could shift to earth colors in 2530
Related Products under HTS 2509.00.20.00
Chalk Powder for Industrial Fillers
Finely ground natural chalk powder (calcium carbonate) used as a filler in paints, plastics, and rubber manufacturing. Classified under HTS 2509.00.20.00 as 'other' chalk, distinct from processed or writing chalk.
Raw Chalk Rock for Crushing
Large blocks of raw natural chalk stone intended for crushing into aggregate or powder in construction and manufacturing. This raw form qualifies as 'other' chalk under HTS 2509.00.20.00.
Chalk Filler for Cement Production
Ground natural chalk used as a functional filler in Portland cement manufacturing to adjust composition. Falls under HTS 2509.00.20.00 as industrial 'other' chalk, not a finished construction product.
Natural Chalk for Soil Amendment
Granular or powdered natural chalk applied to acidic soils to raise pH levels in agriculture. Classified as 'other' chalk in HTS 2509.00.20.00 for its raw mineral state.
Chalk Ore Concentrate
Concentrated natural chalk ore after basic washing and sizing, but before fine grinding, for further processing. HTS 2509.00.20.00 covers this minimally processed 'other' chalk.
Bulk Natural Chalk for Animal Feed
Coarse natural chalk grit used as a calcium supplement in poultry and livestock feed formulations. Remains under HTS 2509.00.20.00 as unprocessed 'other' chalk.