Limestones
The generic term “stones” is used to define those materials that normally do not take a polish; this group includes rather hard rocks such as porphyry, gneiss and quartzite, as well as milder materials such as sandstone, tuff and peperino. Thanks to their good mechanical features, these materials have historically been used as dimension stone as well as for decorative applications in capitals, plinths and friezes for places and buildings of particular importance.
