U.S. imports of Basalt, Porphyry, and Other Monumental or Building Stone (HS 251690) totaled $461K in September 2026, imported from 19 countries.
Importers of Basalt, Porphyry, and Other Monumental or Building Stone paid $80K in duties in September 2026, an average duty rate of 17.38% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: September 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.
51 import shipments a month
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.
Subheading 1 of 4 in heading 2516
Subheading 251690 · $461K of $2.2M
Trade Directory
List your company under HS 251690 — Basalt, Porphyry, and Other Monumental or Building Stone, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2516900060 | Basalt & Other Monumntl/Bldg Stone, Lt 7.5 Cm Thick | $812K | 15.08% | 82.66% | $122K |
| 2516900030 | Basalt & Other Monumntl/Bldg Stone, Gt=7.5 Cm Thick | $108K | 10.69% | 66.22% | $11K |
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 | $874K |
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
$461KYoY · free account
Exports
—YoY · free account
12-mo low · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $5.3M of Basalt, Porphyry, and Other Monumental or Building Stone.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through September 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.
Imports · September 2026
origin
China and Portugal together supply 53% of it. China pays 40.5% duty; Canada 0.0%.
customs district
destination
entry
rate provision · imports
24.9% enters free of duty; duty collected equals 17.38% of imports for consumption.