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U.S. imports of vermiculite, perlite and chlorites, unexpanded (HS 253010) totaled $2.9M in July 2026, traded with 13 countries.
Importers of Vermiculite, Perlite and Chlorites, Unexpanded paid $308K in duties in July 2026 — an effective duty rate of 11% on $2.9M in dutiable value, based on actual customs collections rather than the published tariff schedule. Vermiculite, Perlite and Chlorites, Unexpanded imports of $2.9M in July 2026 ran 28% above the year-to-date monthly average of $2.3M.
Last updated: July 2026 dataUnexpanded vermiculite and perlite are thermally inert minerals that, once heat-treated, expand dramatically into lightweight insulating or horticultural media — but in their raw, unexpanded form they are classified here under 2530100000. Greece is the leading US supplier of unexpanded perlite, reflecting the country's extensive volcanic deposits, with South Africa a major source of raw vermiculite. Importers should note that the 'unexpanded' condition is the classification trigger: material that has already been exfoliated or expanded moves to a different HTS heading, so physical condition at time of import must be clearly documented.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
25 shipments/mo
Expanded or exfoliated vermiculite and expanded perlite are classified under different HTS headings than their unexpanded counterparts. If a shipment contains material that has undergone any thermal expansion — even partial — CBP may reclassify it, resulting in a different duty rate and potential penalties for misclassification. Importers should request supplier confirmation that the product is in its natural, unexpanded state and document this on the commercial invoice.
US perlite expansion plants import raw ore to process domestically, supplying the construction insulation, filtration, and horticulture industries. Importing in unexpanded form is economically efficient because expansion increases volume dramatically — shipping expanded material would be far less cost-effective. This processing model means most US perlite imports enter as raw ore under 2530100000 rather than as finished expanded product.
HSChapter 25
Subheading 2 of 3 in heading 2530
Subheading 253010 · $2.9M of $9.4M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2530100000 | Vermiculite, Perlite and Chlorites, Unexpanded | $2.9M | 10.48% | 97.38% | $308K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2530100000 | Vermiculite, Perlite and Chlorites, Unexpanded | $601K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$2.9MYoY · Pro
Exports
$601KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Greece and South Africa together supply 83% of it.
customs district
destination
entry
rate provision · imports
2.4% enters free of duty; the effective duty rate is 10.48%.