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HSChapter 68
U.S. imports of millstones, grindstones & grinding wheels of natural stone (HS 680423) totaled $2.0M in July 2026, traded with 20 countries.
Importers of Millstones, Grindstones & Grinding Wheels of Natural Stone paid $11K in duties in July 2026 — an effective duty rate of 21% on $51K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataCarved or shaped from quarried stone rather than manufactured bonded composites, natural-stone grinding and milling tools occupy a distinct niche in food processing (grain milling), artisan stonework, and traditional craft industries. All US imports under this heading enter under a single 10-digit line, 6804230000, simplifying classification but requiring careful material verification to confirm the article is genuinely natural stone rather than an agglomerated product. Mexico is the leading supplier to the US market, with Japan and China also notable sources. Distinguishing natural-stone articles from synthetic-bonded counterparts is the most common classification challenge at entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
288 shipments/mo
A material composition certificate or manufacturer's specification sheet identifying the quarried stone type (e.g., sandstone, granite, novaculite) is the most reliable supporting document. CBP may request laboratory analysis if the composition is ambiguous, since agglomerated products with natural-stone grit can superficially resemble solid natural-stone articles.
Yes. Traditional grain milling for artisan flour production, certain Japanese culinary knife-sharpening applications, and heritage stonecutting trades often specify natural stone for its particular cutting characteristics and surface finish. These niche demand segments sustain import flows even where synthetic abrasives dominate industrial use.
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Subheading 4 of 5 in heading 6804
Subheading 680423 · $2.0M of $47.8M
ImportsExports
Imports
$2.0MYoY · Pro
Exports
$882KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 6804230000 | Othr Millstnes Grndstns Etc of Natural Stone | $2.0M | 0.52% | 2.51% | $11K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 6804230000 | Othr Millstnes Grndstns Etc of Natural Stone | $882K |
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.
Imports · July 2026
origin
Mexico and Germany together supply 98% of it.
customs district
destination
entry
rate provision · imports
97.5% enters free of duty; the effective duty rate is 0.52%.