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HSChapter 25
U.S. imports of leucite; nepheline and nepheline syenite (HS 252930) totaled $9.6M in April 2026, traded with 2 countries.
Importers of Leucite; Nepheline and Nepheline Syenite paid $17K in duties in April 2026 — an effective duty rate of 10% on $173K in dutiable value, based on actual customs collections rather than the published tariff schedule. Leucite; Nepheline and Nepheline Syenite imports of $9.6M in April 2026 ran 10% above the year-to-date monthly average of $8.7M.
Last updated: April 2026 dataNepheline syenite — a feldspar-free aluminosilicate rock prized for its low melting point and high alumina content — is the commercially dominant product in this heading and a key raw material for glass, ceramics, and coatings. Canada is overwhelmingly the primary supplier to the US, with Norway the only other significant source, reflecting the geographic concentration of economically viable nepheline syenite deposits. The US schedule further subdivides the heading into nepheline syenite (2529300010) and leucite/nepheline excluding nepheline syenite (2529300050), so importers must confirm the specific mineral form to select the correct 10-digit line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Nepheline syenite melts at a lower temperature than most feldspars and contains no free silica (quartz), which reduces energy consumption in glass melting and lowers occupational silicosis risk during processing. Its high combined alumina and alkali content also improves chemical durability and surface hardness in ceramic glazes, making it a functional upgrade in formulations where those properties matter.
Nepheline syenite is a specific igneous rock composed primarily of nepheline and alkali feldspar; it is distinct from pure nepheline mineral or leucite. Classification hinges on the mineralogical composition of the material as shipped. A petrographic or XRD analysis report from the supplier, combined with the commercial product name used in the trade, is the most reliable basis for selecting the correct 10-digit line. When in doubt, consult a licensed customs broker before entry.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $9.5M | $132K | -$9.3M |
| NORWAY | $137K | -- | -$137K |
| BRAZIL | -- | $23K | +$23K |
| EL SALVADOR | -- | $21K | +$21K |
| THAILAND | -- | $16K | +$16K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2529300010 | NEPHELINE SYENITE | $9.4M | 10.00% | $4K |
| 2529300050 | LEUCITE; NEPHELINE EXCPT NEPHELINE SYENITE | $185K | 10.00% | $14K |
NEPHELINE SYENITE
LEUCITE; NEPHELINE EXCPT NEPHELINE SYENITE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2529300000 | LEUCITE; NEPHELINE AND NEPHELINE SYENITE | $197K |
LEUCITE; NEPHELINE AND NEPHELINE SYENITE
156 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
| Port | Imports | Exports | Balance |
|---|---|---|---|
| DETROIT, MI | $4.1M | $30K | -$4.1M |
| PORT HURON, MI | $3.0M | $96K | -$2.9M |
| BUFFALO-NIAGARA FALLS, NY | $1.6M | -- | -$1.6M |