HS Code 2518Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

What HS code 2518 covers

Dolomite is a rock made mostly of calcium magnesium carbonate. Heading 2518 is the home for dolomite in the forms listed in the customs text. The dolomite can be raw, or it can be heated. It can also be roughly trimmed, or sawn into rectangular blocks or slabs.

Cutting a stone into blocks or slabs does not move it to another heading. Heating does matter, but only at the next level down. Some countries call the same four digits the HSN code 2518, and the meaning is the same.

The heading sits in the Harmonized System, the shared tariff language that customs offices use. Each country adds its own extra digits after the first six. Duty and tax rates depend on that national tariff, so check them with your local customs or run your product through the HS code classifier.

HS 251810 vs 251820: uncalcined or calcined dolomite

The two subheadings differ in one way only. Think of it as a heat test. Calcining means heating a stone so that it changes. Sintering means heating it until its grains fuse together.

Use this rule. If the dolomite has not been calcined or sintered, use 251810. Both codes also take dolomite that is roughly trimmed or cut into rectangular blocks or slabs.

• 251810: uncalcined dolomite.
• 251820: calcined or sintered dolomite. This is dolomite that has been heated, including blocks and slabs.
• Not sure which one fits? Check the supplier's product sheet for words like raw, calcined, burned or sintered.

HS code 2518 vs 2521 limestone and other look-alike headings

Dolomite is easy to confuse with other pale stones. Customs does not group them by colour. It groups them by the name of the stone and by how it is used.

Limestone and other calcareous stone of the kind used to make lime or cement belong in HS 2521 limestone flux and limestone. Marble, travertine and similar calcareous stone belong in HS 2515 marble and travertine.

Loose pieces are a different matter. Pebbles, gravel and crushed stone for concrete or road ballast go to HS 2517 pebbles, gravel and crushed stone. Burned lime products such as quicklime and slaked lime go to HS 2522 quicklime and slaked lime, not to dolomite.

If a shipment is called dolomite on the invoice, start with 2518. If the paperwork says limestone, magnesite or marble, the other headings are the better match.

Dolomite import and export data under HS 2518

A correct code is the first step to finding real trade. Once you know whether your goods are 251810 or 251820, you can look at who is moving them. Use the import data and export data pages to start from the right market.

EximDataX shows shipment-level import and export records from official customs sources. Coverage: 43 direct customs feeds plus 184 mirror-derived countries. Named buyers and named suppliers are available in 38 of the 43 direct markets. Most markets refresh weekly and some refresh daily. You can search by HS code to see who imports and exports a product, and book a free demo.

To find dolomite importers and exporters, search 2518 and then narrow to 251810 or 251820. The buyer data and supplier data pages explain how to build a contact list from those records.