9114.90.10.00 - Jewels

This HTS category, 9114.90.10.00, specifically covers "Jewels" when they are intended for use as parts or accessories in clocks and watches. These jewels are typically small, precisely cut synthetic or natural gemstones, such as rubies or sapphires, used as bearings in the intricate mechanisms of watch and clock movements. Their primary function is to reduce friction and wear on moving parts, thereby enhancing the accuracy and longevity of the timepiece.

This classification is distinct from its sibling categories. For instance, it is differentiated from "Assemblies and subassemblies for watch or clock movements" which involve more complex joined components. It also differs from "Springs, including hairsprings," which are distinct elastic components providing power to the movement. Finally, "Other" within this level would generally encompass a broader range of miscellaneous clock and watch parts not specifically enumerated elsewhere at this level.

As a leaf node, this classification does not have further subcategories. Therefore, the practical classification criteria for goods falling under 9114.90.10.00 rely heavily on their nature as jewels and their explicitly intended use as components within clock or watch movements. This distinguishes them from industrial jewels or decorative gemstones not destined for horological applications.