Ceppo di Poltragno and Ceppo Brecciola. These are two variations of the same lithological unit, from distinct quarries in Poltragno (Pianico municipality). They are grey, very hard and porous natural stones, distinguished by a greater presence of elements and more rounded pebbles in the Brecciola. Thanks to its good technical properties, the strong cementation and the workability, these stony materials are suitable for a broad range of architectural uses.

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