2515.12 - Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:

This HTS category, 2515.12, encompasses marble, travertine, and other calcareous monumental or building stones that have been processed beyond their crude or roughly trimmed state. Specifically, it applies to these stones that have been merely cut, by sawing or other mechanical means, into blocks or slabs of a rectangular (including square) shape. The key distinguishing feature is this precise geometric cutting, which differentiates it from less processed forms.

This distinction is crucial when compared to its sibling category, 2515.11.00.00, which covers crude or roughly trimmed monumental or building stones. While both fall under the broader classification of marble, travertine, and similar calcareous stones with an apparent specific gravity of 2.5 or more, 2515.12 signifies a higher degree of processing through defined cuts. This means that stones exhibiting only basic shaping, without precise rectangular dimensions, would fall under 2515.11.

The subcategories within 2515.12 further refine the classification based on the specific type of calcareous stone. 2515.12.10.00 is designated for marble, which is characterized by its metamorphic origin and often intricate veining. 2515.12.20.00, on the other hand, is for travertine, a type of limestone deposited by mineral springs and typically exhibiting a porous structure. Both subcategories require the material to meet the specified cutting criteria outlined in the parent description.