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HSChapter 25
U.S. exports of basalt, porphyry, and other monumental or building stone (HS 251690) totaled $698K in July 2026.
Importers of Basalt, Porphyry, and Other Monumental or Building Stone paid $81K in duties in July 2026 — an effective duty rate of 24% on $341K in dutiable value, based on actual customs collections rather than the published tariff schedule. Basalt, Porphyry, and Other Monumental or Building Stone imports of $564K in July 2026 ran 31% above the year-to-date monthly average of $431K.
Last updated: July 2026 dataBasalt, porphyry, and other monumental or building stones not classified as granite, marble, travertine, or sandstone fall into this residual heading, which the US schedule further divides by slab thickness: 2516900030 for pieces at least 7.5 cm thick and 2516900060 for those under 7.5 cm thick. Canada is the leading supplier, with China and Turkey also significant sources. Basalt's density and durability make it a preferred material for heavy-duty paving, curbstone, and architectural feature work, while porphyry — historically quarried in Europe — is valued for its distinctive crystalline appearance in high-end landscape design.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
70 shipments/mo
This heading captures igneous and metamorphic stones that do not qualify as granite, marble, travertine, or sandstone under their respective headings — examples include quartzite, trachyte, and other volcanic or plutonic stones used in construction or monumental applications. Classification here requires confirming the stone does not meet the specific mineralogical or commercial definitions of the named stone headings.
The thickness-based subdivision (2516900030 vs. 2516900060) applies to cut or sawn pieces in rectangular or square form. Crude or roughly trimmed basalt that has not been sawn to defined dimensions is generally reported under the base line (2516900000) rather than the thickness-split lines, though importers should confirm the correct line with a licensed customs broker given the specifics of their shipment.
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Subheading 1 of 4 in heading 2516
Subheading 251690 · $564K of $1.8M
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 |
|---|---|---|---|---|---|
| 2516900060 | Basalt & Other Monumntl/Bldg Stone,Lt 7.5 Cm Thick | $376K | 21.27% | 89.28% | $80K |
| 2516900030 | Basalt & Other Monumntl/Bldg Stone,Gt=7.5 Cm Thick | $189K | 0.41% | 3.16% | $777 |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2516900000 | Basalt, Porphyry and Other Mnmntl or Bldg Stone | $698K |
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
$564KYoY · Pro
Exports
$698KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Canada and Japan together take 94% of it.
customs district
origin
entry
rate provision · imports
39.5% enters free of duty; the effective duty rate is 14.29%.