Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite

This code covers articles made of stone or other mineral substances, including those containing magnesite, magnesia, dolomite, or chromite. Use this code for these materials not specified elsewhere, with a general duty rate of free for standard trade partners and potential eligibility for FTA benefits as outlined in Chapter 68.

Detailed information for HTS Code 6815.91.00

This tariff classification falls within Chapter 68, which covers articles of stone, plaster, cement, asbestos, mica, or similar materials. Specifically, code 6815.91.00 covers other articles of stone not elsewhere specified, containing magnesite, magnesia, dolomite, or chromite. There are two statistical subdivisions: 6815.91.00.11 for articles containing over 70% magnesia with specific carbon content and resin bonding, and 6815.91.00.71 for all other articles fitting the general description; choose the suffix that best matches the composition and manufacturing process of the item being classified.

Chapter	Chapter 68 - Articles of stone, plaster, cement, asbestos, mica or similar materials
Section	Section XIII - Articles of Stone, Plaster, Cement, Asbestos, Mica or Similar Materials; Ceramic Products; Glass and

Duty snapshot

Quick reference for the duty outcomes tied to this HTS line.

General Duty

Free

Standard trade partners (NTR)

Special Duty

N/A

Eligible FTA or preference programs

The general duty rate for HTS code 6815.91.00 and its subdivisions, 6815.91.00.11 and 6815.91.00.71, is Free, meaning no duty is assessed on goods falling under this code. Standard trade partners (NTR) are eligible for this rate. Special rates or eligibility for FTA/preference programs are not specified, implying that any applicable benefits would need to be determined separately based on the country of origin and existing trade agreements. All goods under this HTS code are reported in kilograms (kg).

Rate of Duty (Column 2): 30%

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Code subdivisions

6815.91.00.11

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: > Containing magnesite, magnesia in the form of periclase, dolomite including in the form of dolime, or chromite > 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

6815.91.00.71

View HTS reference

Chapter & section notes

Chapter notes

Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes CHAPTER 68 ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS XIII 68-1 Notes 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. Additional U.S. Notes 1. For the purposes of heading 6802, the term " slabs" embraces flat stone pieces, not over 5.1 cm in thickness, having a facial area of 25.8 cm2 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. Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes XIII 68-2

Section notes

SECTION XIII ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE XIII-1 Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes XIII-2 Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes

Latest update

Last updated

November 15, 2025

Revised every January & July

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