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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pebbles or gravels sized under 256 mm for construction ballast
Pebbles, gravel, and crushed stone encompass pumice if used as aggregate rather than abrasive, per Chapter note prioritizing 2517.
If calcined or sintered into refractory pieces
Refractory bricks of aluminosilicate include heat-treated pumice forms, moving from crude natural abrasives to finished ceramics.
If natural stone for monumental or building purposes
Worked pumice cut into blocks or slabs for construction falls under Chapter 68 natural stone products.
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
• Document crushing as a mining byproduct, not manufacturing; photos of irregular shapes help customs avoid misclassification as processed grit
• Test for purity to exclude garnet or corundum admixtures that could shift to other subheadings; silica content reports aid compliance
• Bulk shipments prone to dust loss—use sealed containers and declare net weight post-settling to prevent valuation disputes
Related Products under HTS 2513.10.00.10
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.
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.