2513.10.00 - Pumice stone

This HTS category, 2513.10.00, specifically covers "Pumice stone." Pumice is a naturally occurring, lightweight, porous volcanic rock formed from rapidly cooled lava. Its characteristic vesicular texture and abrasive qualities make it suitable for various industrial and consumer applications, including as an abrasive in cleaning products, a component in lightweight concrete, and in horticultural applications.

This classification is distinguished from its sibling category, 2513.20, which pertains to other natural abrasives such as emery, natural corundum, and natural garnet. While all are natural minerals with abrasive properties, pumice's volcanic origin and distinct cellular structure set it apart from these other hard, crystalline mineral abrasives.

The subcategories under 2513.10.00 provide further refinement based on the form of the pumice. 2513.10.00.10 covers pumice that is either in its crude state or has been broken down into irregular pieces, including crushed pumice, representing the material in a less processed form. The residual category, 2513.10.00.80, is for pumice that does not meet the criteria for the "crude or in irregular pieces" designation, implying more processed or shaped forms that are not otherwise specified.