The rock that characterises the area around the Rimonio stream is the Majolica limestone. Due to its strength and the geometric arrangement in layers of about 10-20 cm, typical of this site, the stone was used as building and ornamental material. In other outcrops of the Serchio Valley, where the layers have a greater thickness, the use of Majolica is linked to the production of aggregates and cements.
For the above-mentioned characteristics, a small quarry was created in the dry part of the stream bed, where ornamental material, called "Pietra di Riana", was extracted. It was used for paving, stairs and building cladding, even of a certain value. Probably in past centuries it was also used for the construction of some parts of the Church of S. Andrea at Ceserana and other churches in our territory.
Perhaps the main use for which it is known is in the stone cladding of fireplaces. In the last century a family of local stonemasons, the Bartolai, used it to make dozens and dozens of fireplaces throughout the Serchio Valley, some of which were particularly artistic.
The mining area is now closed after having been used also as an aggregate quarry for some years.
