An article belongs here only when it is made of stone or a mineral substance and does not meet the criteria of any more specific heading — such as those for asbestos articles, refractory ceramics, magnesite/dolomite/chromite articles, or named stone products like slate or granite. Importers should work through the classification hierarchy systematically before defaulting to this residual heading.

Certain stone and mineral articles from specific origins have been subject to antidumping or countervailing duty orders, and some may be affected by Section 301 tariffs depending on the country of origin. Importers should check the USITC and CBP databases for active orders applicable to the specific article and supplier country before entry.