6815.91
Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite
Articles of stone or of other mineral substances (including carbon fibers, articles of carbon fibers and articles of peat), not elsewhere specified or included > Other articles
Where this code sits
- Section XIII · Chapter68 — ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALSARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE
- Heading6815 — Articles of stone or of other mineral substances (including carbon fibers, articles of carbon fibers and articles of peat), not elsewhere specified or included
- Subheading6815.91 — Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite
Six digits is as far as the international nomenclature goes, and it is the same six digits in every country that applies the Harmonized System. Your destination adds further digits of its own, and the rate lives on that national line — which is why the US lines below run to eight and ten digits, and why the lookups go to each authority's own tariff.
Duty rate
USITC Harmonized Tariff Schedule of the United States, Revision 18 (2026) · retrieved 13/09/2026
Measures in force on top of this rate
- Antidumping/countervailing duties not checked — they are administered separately, keyed to the exporter, and can exceed the tariff rate. Check for an order in force before relying on this total.
Paste 6815.91 into the lookup and follow it down to your national line.
US national lines under 6815.91
The United States subdivides this subheading into 3 lines. They share a duty rate, so the classification below the subheading affects reporting rather than the amount.
| Line | Description | General | Preferential |
|---|---|---|---|
| 6815.91.00 | Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite | Free | — |
| 6815.91.00.11 | Containing by weight more than 70 percent magnesia, expressed as MgO, with carbon content ranging from trace amounts to less than 30 percent, and chemically bonded by resin or pitch | Free stated on 68159100 | — |
| 6815.91.00.71 | Other | Free stated on 68159100 | — |
A blank General cell means the line states no rate of its own and takes the one above it — the line it is stated on is named, so the figure can be checked where it actually appears. Preferential rates are listed with the programme codes that grant them; the schedule offering a rate is not the same as your goods qualifying for it.
Preferential rates for 6815.91
No preference programme applies to these lines for any origin — the general rate is the rate, wherever the goods come from. That is worth knowing: there is nothing to claim here, so no certificate of origin will reduce the duty.
What chapter 68 excludes
A subheading's wording does not decide a classification — the legal notes do. These are the notes that push goods out of this chapter even when the description seems to fit.
1. This chapter does not cover:
- (a) Goods of chapter 25;
- (b) Coated, impregnated or covered paper and paperboard of heading 4810 or 4811 (for example, paper and paperboard coated with mica powder or graphite, bituminized or asphalted paper and paperboard);
- (c) Coated, impregnated or covered textile fabric of chapter 56 or 59 (for example, fabric coated or covered with mica powder, bituminized or asphalted fabric);
- (d) Articles of chapter 71;
- (e) Tools or parts of tools, of chapter 82;
- (f) Lithographic stones of heading 8442;
- (g) Electrical insulators (heading 8546) or fittings of insulating material of heading 8547;
- (h) Dental burrs (heading 9018);
- (ij) Articles of chapter 91 (for example, clocks and clock cases);
- (k) Articles of chapter 94 (for example, furniture, luminaires and lighting fittings, prefabricated buildings);
- (l) Articles of chapter 95 (for example, toys, games and sports equipment);
- (m) Articles of heading 9602, if made of materials specified in note 2(b) to chapter 96, or of heading 9606 (for example, buttons), of heading 9609 (for example, slate pencils), heading 9610 (for example, drawing slates) or of heading 9620 (monopods, bipods, tripods and similar articles); or
- (n) Articles of chapter 97 (for example, works of art).
2. For the purposed of heading 6810, the term " tiles" does not include any article 3.2 cm or more in thickness.
Legal notes that govern this code
Reproduced from the published tariff schedule. Section and chapter notes are binding and are part of the nomenclature itself; statistical notes are US reporting rules and are not classification law.
Chapter 68 — Notes
Legal Notes of the Harmonized System. Binding, and part of the international nomenclature.
1. This chapter does not cover:
(a) Goods of chapter 25;
(b) Coated, impregnated or covered paper and paperboard of heading 4810 or 4811 (for example, paper and paperboard coated with mica powder or graphite, bituminized or asphalted paper and paperboard);
(c) Coated, impregnated or covered textile fabric of chapter 56 or 59 (for example, fabric coated or covered with mica powder, bituminized or asphalted fabric);
(d) Articles of chapter 71;
(e) Tools or parts of tools, of chapter 82;
(f) Lithographic stones of heading 8442;
(g) Electrical insulators (heading 8546) or fittings of insulating material of heading 8547;
(h) Dental burrs (heading 9018);
(ij) Articles of chapter 91 (for example, clocks and clock cases);
(k) Articles of chapter 94 (for example, furniture, luminaires and lighting fittings, prefabricated buildings);
(l) Articles of chapter 95 (for example, toys, games and sports equipment);
(m) Articles of heading 9602, if made of materials specified in note 2(b) to chapter 96, or of heading 9606 (for example, buttons), of heading 9609 (for example, slate pencils), heading 9610 (for example, drawing slates) or of heading 9620 (monopods, bipods, tripods and similar articles); or
(n) Articles of chapter 97 (for example, works of art).
2. In heading 6802 the expression "worked monumental or building stone" applies not only to the varieties of stone referred to in heading 2515 or 2516, but also to all other natural stone (for example, quartzite, flint, dolomite and steatite) similarly worked; it does not, however, apply to slate.
Chapter 68 — Additional U.S. Notes
Additional U.S. Notes. Binding in the United States; not part of the international HS.
1. For the purposes of heading 6802, the term " slabs" embraces flat stone pieces, not over 5.1 cm in thickness, having a facial 2 area of 25.8 cm or more, the edges of which have not been beveled, rounded or otherwise processed except such processing as may be needed to facilitate installation as tiling or veneering in building construction.
2. For the purposed of heading 6810, the term " tiles" does not include any article 3.2 cm or more in thickness.
Notes are reproduced from the published tariff schedule. They govern classification, but reading them is not the same as applying them to your goods — that is what a broker or a binding ruling is for.
Other subheadings under 6815
Elsewhere in chapter 68
Importing 6815.91 into
Each guide covers how duty and tax are assessed there, the authority with jurisdiction, and what catches importers out.
Common questions
What is HS code 6815.91?
6815.91 covers Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite. It sits under heading 6815 (Articles of stone or of other mineral substances (including carbon fibers, articles of carbon fibers and articles of peat), not elsewhere specified or included) in chapter 68, articles of stone, plaster, cement, asbestos, mica or similar materials.
What is the US duty rate for 6815.91?
The Column 1 General rate is Free, from US national line 6815.91.00. That is the rate before any preference you can claim, and it does not include antidumping or countervailing duties, which are administered separately and can exceed it.
What is excluded from chapter 68?
1. This chapter does not cover: (a) Goods of chapter 25; (b) Coated, impregnated or covered paper and paperboard of heading 4810 or 4811 (for example, paper and paperboard coated with mica powder or graphite, bituminized or asphalted paper and paperboard); (c) Coated, impregnated or covered textile fabric of chapter 56 or 59 (for example, fabric coated or covered with mica powder, bituminized or asphalted fabric); (d) Articles of chapter 71;