Nepheline Syenite Feldspar Blend
Nepheline syenite feldspar blend is a natural mineral product sourced from nepheline syenite deposits, valued for its low iron and high alkali content, making it ideal for paint extenders and ceramic applications. The dominant feldspar component ensures classification under tariff item 2529.10.00, even though the deposit also contains nepheline. The product is in a crude or mechanically processed state, consistent with Chapter 25 Note 1.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product contains more leucite than feldspar
Leucite is separately classified under heading 25.29, and the dominant mineral determines the subheading.
If the feldspar is not the primary component
Other mineral substances not elsewhere specified may fall under heading 25.30.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify that the blend has not been subjected to mixing or chemical processing beyond washing or mechanical treatment, as this could exclude it from Chapter 25
• Keep detailed mineral composition data to support the feldspar-dominant claim
• Consult a customs broker to confirm whether the product qualifies for any tariff preference under trade agreements
Related Products under Tariff item 2529.10.00
Ceramic Grade Feldspar
Ceramic grade feldspar is a naturally occurring mineral that has been crushed, ground, and graded for use in ceramics, with low iron content to prevent discoloration in tiles and sanitaryware. It is processed only by mechanical means, such as crushing and grinding, which does not alter its chemical structure, and it is not mixed with other substances. This places it squarely under tariff item 2529.10.00 as feldspar in its crude or mechanically processed state.
Glass Grade Feldspar Powder
Glass grade feldspar powder is natural feldspar that has been finely milled to a uniform particle size for use in soda-lime glass production. The milling process is a mechanical physical process that does not change the mineral's structure, and the powder is not chemically synthesized or mixed with other materials. Therefore, it qualifies as feldspar under tariff item 2529.10.00.
Leucite Ore Feldspar
Leucite ore feldspar is a natural mineral extracted from volcanic rocks rich in leucite, used primarily in specialty ceramics that require a high potash flux. Although it contains leucite, the primary mineral is feldspar, which qualifies it under tariff item 2529.10.00. The product is in a crude or processed state (crushed, ground, or powdered) as permitted by Chapter 25 Note 1.
Potassium Feldspar Powder
Potassium feldspar powder, also known as orthoclase, is a naturally occurring rock-forming mineral that is mined and ground into a fine powder for use as a flux in ceramic glazes and porcelain production. The grinding is a mechanical process that does not alter the mineral's chemical structure, and the product is not mixed with other materials. This makes it classifiable as feldspar under tariff item 2529.10.00.
Sodium Feldspar Lumps
Sodium feldspar lumps, also known as albite, are extracted from pegmatite deposits and are used in glass manufacturing as a source of alumina and silica. The lumps are in their natural state, having undergone only extraction and possibly simple washing or crushing, which are permitted processes under the chapter notes. As raw feldspar, this product falls under tariff item 2529.10.00.