2518.10.00.00 - Dolomite, not calcined or sintered

This HTS classification, 2518.10.00.00, specifically covers dolomite that has not undergone calcination or sintering processes. Dolomite is a carbonate mineral composed of a double carbonate of calcium and magnesium. Under this heading, it includes dolomite in its natural state, as well as that which has been roughly trimmed or merely cut into blocks or slabs of a rectangular (including square) shape. The key defining characteristic is the absence of thermal treatment that would alter its chemical composition or structure.

The primary distinction of this category from its sibling, 2518.20.00.00, lies in the processing. While both relate to dolomite, this heading encompasses the raw or minimally processed mineral, whereas 2518.20.00.00 specifically pertains to dolomite that has been calcined (heated to a high temperature) or sintered (fused together by heating). Therefore, if the dolomite has been subjected to these high-temperature treatments, it would be classified under the sibling heading, not this one.

As this is a leaf node within the HTS structure, there are no further subcategories to detail. Classification decisions for 2518.10.00.00 will therefore hinge on the fundamental criteria of the material being dolomite and its state of processing – specifically, that it remains uncalcined and unsintered, irrespective of whether it has been sawn into basic geometric shapes.