2516: Granite, porphyry, basalt, sandstone, etc.

251611: Granite, crude or roughly trimmed 251612: Granite, merely cut into blocks etc 251621: Sandstone, crude or roughly trimmed 251622: Sandstone, merely cut into blocks etc 251690: Monumental or building stone nes, porphyry and basalt 2516: Granite, porphyry, basalt, sandstone, etc.