Marble and travertine; having a specific gravity of 2.5 or more, crude or roughly trimmed by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

HS code 251511 covers the trade of crude or roughly trimmed marble and travertine, which are types of natural stone with a specific gravity of 2.5 or more. These materials are essential inputs for the construction, architecture, and interior design industries, contributing to the development of infrastructure, buildings, and decorative elements worldwide. As a key component of the global natural stone market, the 251511 industry plays a vital role in supporting economic growth and meeting the demand for high-quality building materials.

The production of marble and travertine covered under HS code 251511 typically involves the extraction of these natural stones from quarries, followed by primary processing steps such as sawing, trimming, and shaping the blocks or slabs into rectangular or square forms. The specific techniques used may vary depending on the characteristics of the raw material, the desired final product, and the technological capabilities of the producers.

The main inputs required for the 251511 industry are the natural deposits of marble and travertine, which are found in various regions around the world. In addition to the raw materials, the industry relies on specialized machinery and equipment for quarrying, cutting, and shaping the stones, as well as transportation infrastructure to move the products to domestic and international markets. Energy sources, such as electricity or fuel, are also essential for powering the production processes.

The primary outputs of the 251511 industry are crude or roughly trimmed blocks and slabs of marble and travertine, which are then further processed and utilized in a wide range of applications. These materials are often consumed by industries such as 251512 (Marble and travertine, merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape), 680221 Marble, travertine and alabaster, simply cut or sawn, with a flat or even surface, and 680291 Marble, travertine and alabaster, worked, and articles thereof, other than goods of heading 6802.10, which transform the raw materials into finished products for the construction, architecture, and interior design sectors.