7103.91.00 - Rubies, sapphires and emeralds

This HTS classification covers rubies, sapphires, and emeralds that have been worked beyond simple grading but are not yet strung, mounted, or set. This includes cutting, polishing, faceting, or any other process that modifies the physical form of the precious stones. The key distinction for this subheading is that the stones retain their individual identity and are not assembled into jewelry or other finished articles at this stage.

Subheading 7103.91.00 is distinct from its sibling category, 7103.99, which covers "Other" worked precious or semiprecious stones not specifically enumerated here. While both subheadings fall under the broader category of "Otherwise worked" stones, 7103.91.00 is specifically reserved for the three most well-known and valuable gemstones: rubies, sapphires, and emeralds. Any other worked precious or semiprecious stones would be classified under the "Other" subheading.

Within this classification, further subdivisions exist to distinguish between these specific precious stones. Subcategories 7103.91.00.10 for rubies, 7103.91.00.20 for sapphires, and 7103.91.00.30 for emeralds allow for a more granular level of detail in classification. This segregation is based on the inherent gemological properties and market value of each distinct gemstone type, facilitating accurate inventory management and trade statistics.