2525.10.00.10 - Split block mica

This HTS category encompasses split block mica, a form of mica that has been physically separated from larger blocks into thinner, flat pieces. The splitting process is a preparatory step, creating usable sheets or segments from crude mica, often for subsequent processing into more refined mica products. The key characteristic here is the direct result of splitting block mica, retaining a certain thickness and structure as a distinct form.

While this category covers split block mica, it is important to differentiate it from its sibling, 2525.10.00.20, which specifically refers to mica splittings. Mica splittings are generally much thinner and more delicate than split block mica, often produced through further processing of split block mica or directly from crude mica by methods that yield significantly thinner, overlapping sheets. Category 2525.10.00.50 serves as a residual category for any other forms of crude or rifted mica not specifically covered by the preceding subheadings.

As this classification is a leaf node, there are no further subdivisions under 2525.10.00.10. Classification into this specific subheading is determined by the physical form of the mica as split block, indicating a stage of preparation beyond crude but not yet reduced to the thinness of splittings. This distinction is crucial for accurate import and export declarations.