Piperno is a particular variety of

dimension stone Dimension stone is natural stone or Rock (geology), rock that has been selected and finished (e.g., trimmed, cut, drilled or ground) to specific sizes or shapes. Color, Texture (geology), texture and pattern, and surface finish of the stone are ...

igneous Igneous rock ( ), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava. The magma can be derived from partial ...

origin, a

tuff Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock co ...

ignimbrite Ignimbrite is a type of volcanic rock, consisting of hardened tuff. Ignimbrites form from the deposits of pyroclastic flows, which are a hot suspension of particles and gases flowing rapidly from a volcano, driven by being denser than the surrou ...

, native to areas in Southern

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

that have been affected by explosive volcanic activity. Piperno abounds in

Campania Campania is an administrative Regions of Italy, region of Italy located in Southern Italy; most of it is in the south-western portion of the Italian Peninsula (with the Tyrrhenian Sea to its west), but it also includes the small Phlegraean Islan ...

; the areas from which it was obtained were the city of

Quarto Quarto (abbreviated Qto, 4to or 4º) is the format of a book or pamphlet produced from full sheets printed with eight pages of text, four to a side, then folded twice to produce four leaves. The leaves are then trimmed along the folds to produc ...

, Soccavo, Pianura and

Nocera Inferiore Nocera Inferiore ( or simply , , locally ) is a town and ''comune'' in the province of Salerno, in Campania in southern Italy. It lies west of Nocera Superiore, at the foot of Monte Albino, some 20 km east-southeast of Naples by rail. ...

in the supervolcano region of the

Phlegraean Fields The Phlegraean Fields (, ; ) is a large volcano, volcanic caldera west of Naples, Italy. The Neapolitan Yellow Tuff eruption (about 12ka BP) produced just 50 cubic kilometers. It is, however, one of relatively few volcanoes large enough to f ...

. The Piperno layer, with the overlying Breccia Museo, is clearly visible at the base of the Camaldoli hill, in the Soccavo and Verdolino areas. This type of

tuff takes on a particular texture characterised by the orientation of lenticular concentrations of grey colour, called flames, immersed in a matrix of the same colour but lighter. Piperno should not be confused with Neapolitan Yellow

Tuff Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock co ...

; welded piperno tuff is more durable than yellow tuff, which poses conservation challenges. Piperno rock is not easy to extract, and is helped by underground separation of the large blocks that are subsequently worked; it is resistant to the wear and tear of atmospheric agents and for this reason it has been widely used for the cladding of buildings in

Naples Naples ( ; ; ) is the Regions of Italy, regional capital of Campania and the third-largest city of Italy, after Rome and Milan, with a population of 908,082 within the city's administrative limits as of 2025, while its Metropolitan City of N ...

. Currently it is no longer extracted as the underground quarries in Pianura and Soccavo are exhausted. Campanian piperno is a cousin to

peperino Peperino is an Italian word describing a brown or grey volcanic tuff, containing fragments of basalt and limestone, with disseminated crystals of augite, mica, magnetite, leucite, and other similar minerals. The name originally referred to the ...

tuff from

Lazio Lazio ( , ; ) or Latium ( , ; from Latium, the original Latin name, ) is one of the 20 Regions of Italy, administrative regions of Italy. Situated in the Central Italy, central peninsular section of the country, it has 5,714,882 inhabitants an ...

References

{{reflist Tuff