Monumental or building stone; n.e.c. in heading no. 2516, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

HS code 251690 covers: Monumental or building stone; n.e.c. in heading no. 2516, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape. This 'not elsewhere specified' (NES) code within heading 2516 covers various other monumental or building stones, such as porphyry, basalt, quartzite, or slate, in their raw (roughly trimmed) or initially cut (rectangular blocks/slabs) forms. These stones are selected for specific aesthetic, structural, or durability requirements in diverse applications, including high-traffic paving, specialized architectural features, and monumental works. Importers are often specialized construction companies, architects, and stone fabricators seeking unique or high-performance materials not covered by the more common granite, marble, or sandstone categories. Exporters are countries with diverse geological resources and the infrastructure to quarry and process these less common but equally valuable building stones, catering to niche markets and specialized architectural projects globally.

Porphyry blocks, basalt slabs, quartzite building stone, slate blocks (for building), serpentine slabs, rough diorite blocks, gabbro cut blocks

This code is a residual category for stones not covered by 2515 (marble, alabaster) or specific granite/sandstone codes (251611, 251612, 251620); it's crucial to ensure the stone isn't already classified elsewhere.

HS code 251690 is a 6-digit subheading under the Harmonized System. The first 2 digits (25) identify the chapter, digits 3-4 (16) identify the heading, and digits 5-6 (90) specify the subheading. This code is standardized globally by the World Customs Organization.