Raw Pumice Stone Lumps
Unprocessed pumice stone extracted from volcanic deposits, used primarily as a natural abrasive in industrial grinding and polishing applications. It falls under HTS 2513.10.00 as crude pumice stone, whether or not heat-treated, distinct from manufactured abrasives. The porous, lightweight nature makes it ideal for tumbling and surface preparation.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cut into specific abrasive blocks or shapes
Millstones or grindstones from natural abrasives like pumice are classified under heading 6804, not crude forms.
If for unexpanded pumice used in horticulture or filtration
Heading 2530 covers mineral substances like unexpanded pumice for non-abrasive end uses, per chapter notes.
If agglomerated or reconstituted into sheets
Agglomerated pumice products worked after molding fall under heading 6815 for built-up mineral articles.
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Import Tips & Compliance
• Verify origin certificates to confirm natural pumice and avoid misclassification as synthetic abrasives; ensure heat-treatment status is documented if applicable; watch for contamination that could shift it to waste headings
Related Products under HTS 2513.10.00
Heat-Treated Pumice Gravel
Pumice stone gravel thermally processed to enhance durability for use in concrete aggregates and water filtration systems. Classified under HTS 2513.10.00 as heat-treated pumice stone, retaining its natural abrasive properties. The treatment improves density without altering its fundamental pumice composition.
Volcanic Pumice Powder
Finely ground pumice stone powder from natural volcanic sources, employed as an abrasive in metal polishing and paint additives. HTS 2513.10.00 covers this as pumice stone in powdered form, not further manufactured into grinding wheels. Its high silica content provides effective cutting action.
Lava Pumice Stones for Tumbling
Medium-sized pumice stones specifically sized for rock tumbling and lapidary work, sourced from lava flows. Under HTS 2513.10.00 as natural pumice abrasives, suitable for hobbyist and industrial polishing. The irregular shapes provide multi-directional abrasion.
Industrial Pumice Aggregate
Coarse pumice aggregate for lightweight concrete blocks and precast panels, heat-treated for strength. HTS 2513.10.00 applies to this natural abrasive in aggregate form before mixing. Reduces overall concrete weight while maintaining abrasiveness.
Natural Pumice for Stone Washing
Selected pumice stones used in textile stone-washing processes to achieve distressed denim looks. Classified HTS 2513.10.00 as pumice stone abrasives for industrial textile finishing. Size and porosity optimized for fabric abrasion without shredding.
Pumice Filter Media
Granular pumice stone serving as filter media in water treatment and aquariums due to its porous structure. HTS 2513.10.00 for natural pumice, valued for abrasive yet filtering properties. Heat-treated variants resist breakdown.