Slate; whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

HS code 251400 covers the classification of slate, a metamorphic rock that has been used in construction and roofing for centuries. Slate is prized for its durability, water-resistance, and distinctive appearance, making it a valuable commodity in the global building materials trade. This industry plays a crucial role in supporting infrastructure development and renovation projects worldwide, contributing to the broader economic activity in the construction sector.

The production of slate involves the extraction of raw slate deposits from quarries, followed by a series of processing steps. Slate is typically mined using heavy machinery, then cut or trimmed into rectangular blocks or slabs using saws or other cutting tools. The processed slate is then graded, sorted, and prepared for distribution to various end-users.

The main inputs required for the slate industry include the raw slate deposits, which are the primary natural resource. Additionally, the industry relies on specialized mining and cutting equipment, such as excavators, saws, and polishing machines. Energy sources, such as electricity or fuel, are also necessary to power the production processes. Labor, transportation, and logistics services are other significant inputs that enable the efficient movement of slate products from the quarries to the end-users.

The primary output of the slate industry is the processed slate, which is used in a variety of applications, including roofing, flooring, wall cladding, and decorative purposes. The slate produced under HS code 251400 may be consumed by industries covered under other codes, such as 680221 Marble, travertine, alabaster and articles thereof, simply cut or sawn, with a flat or even surface and 680229 Other monumental or building stone and articles thereof, simply cut or sawn, with a flat or even surface.