Crude Pumice Stone Blocks
Large, unprocessed blocks of natural pumice stone extracted directly from volcanic deposits, remaining in their crude form without further shaping or sizing. This falls under HTS 2513.10.00.10 as crude pumice in irregular pieces, suitable for industrial grinding or further processing into abrasives. It has not been cut, powdered, or refined beyond initial mining.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ground into powder or granules exceeding crude form
Millstones and grindstones of natural stone include processed pumice when cut or shaped for abrasive use, shifting from raw Chapter 25 to worked Chapter 68.
If expanded or thermally processed for lightweight aggregate
Siliceous fossil meals like diatomite cover heat-expanded pumice variants used in construction, as they alter the natural crude state.
If sold as unexpanded vermiculite or perlite mixture
Other mineral substances include pumice-like materials if blended or not purely crude pumice, per Chapter 25 notes.
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 the pumice is in crude or irregular pieces under 0.508 mm thickness exclusion for split materials; provide geological origin certificates to confirm natural status
• Ensure no heat-treatment beyond mining to avoid reclassification; common pitfall is contamination with processed abrasives triggering higher duties
• Declare exact weight and volume accurately as pumice is low-density; use ISPM-15 compliant packaging for bulk shipments to prevent quarantine issues
Related Products under HTS 2513.10.00.10
Crushed Volcanic Pumice Chunks
Irregular chunks of pumice stone crushed during mining but not further refined, sized roughly 5-15 cm, ideal for tumbling into lapidary abrasives. Classified under HTS 2513.10.00.10 for crude or crushed pumice not cut to dimensions or powdered. Retains natural vesicular structure for filtration and polishing applications.
Mining Crushed Pumice Fines
Coarse fines from pumice quarry crushing operations, irregular pieces under 5 cm retaining natural porosity, not screened or graded for uniformity. Falls under HTS 2513.10.00.10 as crushed pumice in crude state, distinct from powdered forms. Applied in horticulture soil amendment and lightweight concrete.
Unscreened Pumice Quarry Run
Direct-from-quarry pumice mixture of irregular pieces and light crushing, unsorted sizes 2-30 cm for bulk abrasive feedstock. HTS 2513.10.00.10 classification as crude pumice including crushed material, pre-processing stage. Essential raw material for polishing compounds and exfoliants.
Raw Italian Pumice Irregular Pieces
Natural pumice from Lipari Island mines, supplied in irregular hand-broken pieces averaging 10-20 cm, crude form for export to abrasive manufacturers. HTS 2513.10.00.10 covers this as unworked pumice stone, heat-treated only by natural volcanic process. Used primarily in stone washing denim and water filtration.