2506.20.00 - Quartzite

This HTS category, 2506.20.00, specifically covers quartzite. Quartzite is a metamorphic rock, primarily composed of quartz, which has undergone significant transformation from its original sandstone or chert form. The classification extends to quartzite that has been roughly trimmed or simply cut into blocks or slabs of a rectangular or square shape. This includes products that are not further processed beyond basic shaping.

It is important to distinguish this category from its sibling, 2506.10.00, which covers quartz (other than natural sands). While both are quartz-rich materials, quartzite's defining characteristic is its metamorphic origin, resulting in a dense, interlocking crystalline structure that differs from the looser, more granular composition of natural quartz.

Within 2506.20.00, further subdivisions exist to refine the classification based on the degree of processing. The subcategory 2506.20.00.10 pertains to quartzite that is in its crude state or has only undergone rough trimming. Conversely, 2506.20.00.80 encompasses other forms of quartzite that have been more precisely cut into blocks or slabs, but still do not represent further finished products beyond basic geometric shaping.