Product classification
HS code for Dolomite: 2518.10
Dolomite, not calcined or sintered, including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape.
Classification of dolomite under HS 2518.10
Dolomite is classified under HS code 2518.10. This code is situated within Chapter 25, which covers salt, sulfur, earths and stone, plastering materials, lime, and cement. Heading 25.18 specifically covers dolomite, whether or not calcined or sintered. Subheading 2518.10 is dedicated to dolomite that has not been calcined or sintered. This includes natural dolomite that is in its crude state, roughly trimmed, or merely cut by sawing into blocks or slabs of a rectangular or square shape. The classification is based on the chemical composition of the mineral (calcium magnesium carbonate) and the lack of thermal processing. If the dolomite has been heated to high temperatures to change its chemical or physical properties, it moves to a different subheading.
- Covers
- Crude dolomite rock
- Crushed dolomite (not calcined)
- Dolomite powder (natural and untreated)
- Dolomite slabs (merely sawn)
- Roughly trimmed dolomite blocks
- Also under 2518.10
- Carmeuse Dolomite
- Graymont Dolomite
- R.W. Sidley Dolomite
- US Aggregates Dolomite
Codes often confused with 2518.10
Common mistake. The most common misclassification for dolomite is HS code 2518.20, which covers calcined or sintered dolomite. Importers often fail to distinguish between the raw mineral and the heat-treated version used in refractory linings. Another error is using HS code 2517.10, which covers pebbles, gravel, and crushed stone used for concrete aggregates or road metal. While dolomite can be used for these purposes, heading 25.18 is more specific to the mineral identity of dolomite and therefore takes precedence according to GRI 3(a).
Top exporters and importers of HS 251810 (the code used for dolomite), 2025
In 2025, the largest exporter of HS 251810 (the code used for dolomite) in UN Comtrade data was Bhutan, with 17% of world exports; the largest importer in UN Comtrade data was India, with 25% 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 251810, not only dolomite.
Top exporters 2025 · share of world exports
- 1 Bhutan $53M 17% of world exports
- 2 United Arab Emirates* ~$39M 13% of world exports · partner records ↗
- 3 Spain $23M 7.5% of world exports
World total: $309M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 India $126M 25% of world imports
- 2 Japan $67M 13% of world imports
- 3 China $51M 10% of world imports
World total: $499M 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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 dolomite
Brazil classifies dolomite under NCM 2518.10.00: HS 2518.10 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about dolomite
What is the HS code for Dolomite?
The HS code for Dolomite is 251810 (Dolomite, not calcined or sintered; including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape). The HS code for non-calcined and non-sintered dolomite is 2518.10.
How do I classify Dolomite for customs?
Dolomite is classified under HS code 251810 — Dolomite, not calcined or sintered; including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape. This is a 6-digit subheading level code.
What is the difference between 2518.10 and 2518.20?
HS code 2518.10 is for raw or merely cut dolomite, while 2518.20 is for dolomite that has been calcined or sintered (heat-treated).
Which countries are the top exporters of dolomite (HS 251810)?
In 2025, the top exporters of HS 251810 (the code used for dolomite) in UN Comtrade data were Bhutan ($53M, 17% of world exports), the United Arab Emirates (about $39M) and Spain ($23M). World exports came to about $309M, 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 dolomite (HS 251810)?
In 2025, the top importers of HS 251810 (the code used for dolomite) in UN Comtrade data were India ($126M, 25% of world imports), Japan ($67M) and China ($51M). World imports came to about $499M, 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 Dolomite the same in all countries?
The base HS code 251810 for Dolomite 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 dolomite in Brazil?
In Brazil, dolomite (HS 251810) is classified under NCM 2518.10.00.