6814 - Worked mica and articles of mica, including agglomerated or reconstituted mica, whether or not on a support of paper, paperboard or other materials:

Chapter 68 of the Harmonized Tariff Schedule (HTS) broadly covers articles manufactured from stone, plaster, cement, asbestos, mica, or similar materials. Within this chapter, Heading 6814 specifically pertains to worked mica and articles derived from mica. This classification encompasses a wide array of mica-based products that have undergone processing beyond their raw, natural state. It includes forms of mica that have been agglomerated or reconstituted, meaning they are bound together or reformed into new structures, and these may or may not be affixed to a supporting material such as paper, paperboard, or other substrates.

The distinction of Heading 6814 from its sibling categories at the Section XIII and Chapter 68 level is primarily based on the specific material. While other headings in Chapter 68 might cover articles of stone (e.g., 6802), cement (e.g., 6810), or asbestos (e.g., 6811), Heading 6814 is exclusively dedicated to products where mica is the principal component or the defining material. This ensures that articles manufactured from mica, regardless of their form or subsequent processing, are categorized distinctly from those made from other mineral substances.

Heading 6814 is further subdivided to account for the various forms these worked mica articles can take. The subcategories differentiate between specific formats of processed mica, such as flat plates, sheets, and strips, which are often formed from agglomerated or reconstituted mica and may be mounted on supports. The "Other" subheading captures all remaining worked mica articles and those manufactured from mica that do not fit the descriptions of the more specific subheadings. This hierarchical structure allows for precise classification of the diverse range of mica products entering international trade.