Granite, porphyry, basalt, sandstone and other monumental or building stone, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

6 tariff lines under Chapter 25 — Salt; sulphur; earths and stone; plastering materials, lime and cement

HSN heading 2516 (GRANITE, PORPHYRY, BASALT, SANDSTONE AND OTHER MONUMENTAL) contains 6 customs tariff items at the 8-digit level. None are covered by a Bureau of Indian Standards (BIS) Quality Control Order; the rest are administered by Partner Government Agencies or carry no requirement.