Heading 2516
Granite, porphyry, basalt, sandstone, other monumental and building stone, whether or not roughly trimmed, cut, by sawing etc, into blocks or slabs of a rectangular (including square) shape
251611
Granite; crude or roughly trimmed
251612
Granite; merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape
251620
Sandstone;. whether or not roughly trimmed, cut, by sawing etc, into blocks or slabs of a rectangular (including square) shape
251690
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