Product classification

HS code for Natural stone grinding wheels: 6804.23

Millstones, grindstones, grinding wheels and the like, of natural stone.

Classification of natural stone grinding wheels under HS 6804.23

Natural stone grinding wheels are classified under HS code 6804.23. This classification is determined by the material composition and the intended function of the article as defined in the Harmonized System. Heading 6804 encompasses millstones, grindstones, grinding wheels, and similar items without frameworks, used for grinding, sharpening, polishing, trueing, or cutting. Subheading 6804.23 specifically isolates those products made of natural stone. Unlike synthetic alternatives, these wheels are shaped directly from naturally occurring stone blocks, such as sandstone, granite, or lava stone. The classification follows General Interpretative Rule (GRI) 1, which dictates that classification is determined by the terms of the headings and any relative section or chapter notes. Since the product is a grinding wheel made of natural stone, it fits precisely into the description provided by 6804.23. The absence of a framework is a key requirement for this heading; if the stone were mounted on a complex mechanical frame, it might be classified as part of a machine in Chapter 84. However, for the stone component itself or simple wheels used for manual or mechanical sharpening, 6804.23 remains the primary code. The material must be natural stone and not agglomerated natural stone powder, which would fall under a different subheading.

Covers
  • Natural sandstone grinding wheels
  • Granite millstones for grain processing
  • Natural lava stone sharpening wheels
  • Hand-operated natural stone grindstones
  • Natural stone wheels for polishing minerals
Also under 6804.23
  • Norton natural sharpening stones
  • Naniwa natural waterstones
  • various artisanal Arkansas stones
  • traditional scythe sharpening stones

Codes often confused with 6804.23

Common mistake. Natural stone grinding wheels are frequently confused with HS code 6804.22, which covers grinding wheels made of agglomerated synthetic or natural abrasives. The distinction lies in whether the wheel is cut from a single block of natural stone (6804.23) or formed by bonding abrasive grains together with a binder (6804.22). Additionally, they may be confused with HS code 6805, which covers natural or artificial abrasive powder or grain on a base of textile material, paper, or paperboard. 6805 is for flexible abrasives, whereas 6804 is for rigid wheels and stones.

6804.22Millstones, grindstones, grinding wheels and the like; of other agglomerated abrasives or of ceramics68.05Abrasive powder or grain; natural or artificial, on a base of textile material, of paper, paperboard or of other material, whether or not cut to shape or sewn or otherwise made up68.04Millstones, grindstones, grinding wheels, etc without frameworks, for grinding, sharpening, polishing, etc and parts thereof, natural stone, agglomerated natural or artificial abrasives or of ceramics

Top exporters and importers of HS 680423 (the code used for natural stone grinding wheels), 2025

In 2025, the largest exporter of HS 680423 (the code used for natural stone grinding wheels) in UN Comtrade data was China, with 27% of world exports; the largest importer in UN Comtrade data was the United States, with 21% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Figures cover everything classified under HS 680423, not only natural stone grinding wheels.

Top exporters 2025 · share of world exports

  1. 1 China $17M
  2. 2 Mexico $12M
  3. 3 United States $7.7M

World total: $63M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $19M
  2. 2 Mexico $8.1M
  3. 3 India $7.1M

World total: $91M Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM code for natural stone grinding wheels

Brazil classifies natural stone grinding wheels under NCM 6804.23.00: HS 6804.23 with 00 added.

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about natural stone grinding wheels

What is the HS code for Natural stone grinding wheels?

The HS code for Natural stone grinding wheels is 680423 (Millstones, grindstones, grinding wheels and the like; of natural stone). The HS code for natural stone grinding wheels is 6804.23.

How do I classify Natural stone grinding wheels for customs?

Natural stone grinding wheels is classified under HS code 680423 — Millstones, grindstones, grinding wheels and the like; of natural stone. This is a 6-digit subheading level code.

Does this code include synthetic diamond wheels?

No, synthetic diamond wheels or wheels made from agglomerated synthetic abrasives are classified under HS code 6804.21 or 6804.22, depending on the specific abrasive material used.

Which countries are the top exporters of natural stone grinding wheels (HS 680423)?

In 2025, the top exporters of HS 680423 (the code used for natural stone grinding wheels) in UN Comtrade data were China ($17M, 27% of world exports), Mexico ($12M) and the United States ($7.7M). World exports came to about $63M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of natural stone grinding wheels (HS 680423)?

In 2025, the top importers of HS 680423 (the code used for natural stone grinding wheels) in UN Comtrade data were the United States ($19M, 21% of world imports), Mexico ($8.1M) and India ($7.1M). World imports came to about $91M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Is the HS code for Natural stone grinding wheels the same in all countries?

The base HS code 680423 for Natural stone grinding wheels is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.

What is the NCM code for natural stone grinding wheels in Brazil?

In Brazil, natural stone grinding wheels (HS 680423) is classified under NCM 6804.23.00.