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HSChapter 25
U.S. imports of basalt, porphyry, and other monumental or building stone (HS 251690) totaled $269K in April 2026, traded with 14 countries.
Importers of Basalt, Porphyry, and Other Monumental or Building Stone paid $66K in duties in April 2026 — an effective duty rate of 35% on $189K in dutiable value, based on actual customs collections rather than the published tariff schedule. Basalt, Porphyry, and Other Monumental or Building Stone imports of $269K in April 2026 ran 20% below the year-to-date monthly average of $334K.
Last updated: April 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.
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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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $77K | $284K | +$207K |
| CHINA | $166K | -- | -$166K |
| MEXICO | $3K | $52K | +$49K |
| SWITZERLAND | -- | $52K | +$52K |
| ANTIGUA AND BARBUDA | -- | $20K | +$20K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2516900060 | BASALT & OTHER MONUMNTL/BLDG STONE,LT 7.5 CM THICK | $235K | 35.52% | $65K |
| 2516900030 | BASALT & OTHER MONUMNTL/BLDG STONE,GT=7.5 CM THICK | $34K | 12.99% | $586 |
BASALT & OTHER MONUMNTL/BLDG STONE,LT 7.5 CM THICK
BASALT & OTHER MONUMNTL/BLDG STONE,GT=7.5 CM THICK
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2516900000 | BASALT, PORPHYRY AND OTHER MNMNTL OR BLDG STONE | $461K |
BASALT, PORPHYRY AND OTHER MNMNTL OR BLDG STONE
1.5K t
PORTLAND CEMENT EXCEPT WHITE PORTLAND CEMENT
HS 252329
SULFUR OF ALL KINDS, NOT SUBLIMED,PRECIP,COLLOIDAL
HS 250300
SALT INCL TBL/DENTRD, PURE SODM CHLOR ETC; SEA WTR
HS 250100
UNGRND NAT CAL PHSPH, ALUM CAL PHOS A PHOS CHALK
HS 251010
FLUORSPAR OV 97% OF CALCIUM FLUORD BY WGHT
HS 252922
PEBBLES, GRAVEL ETC. FOR CONCRETE AGGREGATES ETC.
HS 251710
| State | Imports | Exports | Balance |
|---|---|---|---|
| Indiana | $10K | $193K | +$183K |
| Washington | $77K | $90K | +$13K |
| Virginia | $12K | $74K | +$63K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| DETROIT, MI | -- | $119K | +$119K |
| BLAINE, WA | $21K | $83K | +$62K |
| NORFOLK-NEWPORT NEWS, VA | $10K | $74K | +$64K |