Sarrabus-Gerrei is a sub-region of souther-eastern Sardinia

Sardinia

Sardinia is the second-largest island in the Mediterranean Sea . It is an autonomous region of Italy, and the nearest land masses are the French island of Corsica, the Italian Peninsula, Sicily, Tunisia and the Spanish Balearic Islands.The name Sardinia is from the pre-Roman noun *sard[],...

, Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

.

Sarrabus

Traditionally Sarrabus occupies the area of the communes of Castiadas

Castiadas

Castiadas is a comune in the Province of Cagliari in the Italian region Sardinia, located about 35 km east of Cagliari. Founded in the 14th century and repopulated in the 19th century after centuries of abandonment, it is part of the Sarrabus-Gerrei historical region.Castiadas borders the...

, Muravera

Muravera

Muravera is a comune in the Province of Cagliari in the Italian region Sardinia, located about 45 km northeast of Cagliari in the Sarrabus traditional area....

, San Vito

San Vito

San Vito is a comune in the Province of Cagliari in the Italian region Sardinia, located about 45 km northeast of Cagliari.San Vito borders the following municipalities: Burcei, Castiadas, Muravera, Sinnai, Villaputzu, Villasalto....

 and Villaputzu

Villaputzu

Villaputzu is a municipality in the Province of Cagliari in the Italian region and island of Sardinia, located about 45 km northeast of the sardinian capital Cagliari...

, corresponding to the curatory with the same name of the medieval giudicato of Cagliari

Giudicato of Cagliari

The Giudicato of Cagliari was one of the four Sardinian giudicati of the Middle Ages. It covered the entire south and central east portion of the island and was composed of thirteen subdivisions called curatoriae. To its north and west lay Arborea and north and on the east lay Gallura and Logudoro...

. Geologically, it dates to the Palaeozoic era and it is crossed by the Flumendosa

Flumendosa

The Flumendosa is a river of southern Sardinia, Italy. With a length of , it is the second river of the island behind the Tirso.The Flumendosa's springs are located in the Gennargentu massif, at the feet of the Monte Armidda; it flows into the Tyrrhenian Sea in the area of the towns of Muravera and...

, initially in a valley and then to a coastal plain on the Tyrrhenian Sea

Tyrrhenian Sea

The Tyrrhenian Sea is part of the Mediterranean Sea off the western coast of Italy.-Geography:The sea is bounded by Corsica and Sardinia , Tuscany, Lazio, Campania, Basilicata and Calabria and Sicily ....

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Specimens of the mineral ullmannite

Ullmannite

Ullmannite is a nickel antimony sulfide mineral with formula: NiSbS. Considerable substitution occurs with cobalt and iron in the nickel site along with bismuth and arsenic in the antimony site...

 (NiSbS) were found at Sarrabus in 1887. The crystals of the specimens from Sarrabus were described as hemihedral

Hemipolyhedron

In geometry, a hemipolyhedron is a uniform star polyhedron some of whose faces pass through its center. These "hemi" faces lie parallel to the faces of some other symmetrical polyhedron, and their count is half the number of faces of that other polyhedron - hence the "hemi" prefix.The prefix "hemi"...

 with parallel faces, whereas specimens from Lölling in present-day Austria were hemihedral with inclined faces.

Gerrei

Gerrei is composed of the territories of Armungia

Armungia

Armungia is a comune in the Province of Cagliari in the Italian region Sardinia, located about 40 km northeast of Cagliari.Armungia borders the following municipalities: Ballao, San Nicolò Gerrei, Villaputzu, Villasalto....

, Ballao

Ballao

Ballao is a comune in the Province of Cagliari in the Italian region Sardinia, located about 45 km northeast of Cagliari, in the Gerrei traditional subregion....

, Escalaplano

Escalaplano

Escalaplano is a comune in the Province of Cagliari in the Italian region Sardinia, located about 50 km northeast of Cagliari....

, Goni

Goni

Goni is a town and comune in the province of Cagliari, Sardinia, Italy...

, San Nicolò Gerrei

San Nicolò Gerrei

San Nicolò Gerrei is a comune in the Province of Cagliari in the Italian region Sardinia, located about 35 km northeast of Cagliari, in the Gerrei traditional subregion....

, Silius

Silius

Silius is a town and comune in the province of Cagliari, Sardinia, Italy. As of 2001, it has a population of 1,384....

, Villasalto

Villasalto

Villasalto is a comune in the Province of Cagliari in the Italian region Sardinia, located about 40 km northeast of Cagliari. As of 31 December 2004, it had a population of 1,282 and an area of 130.1 km²....

, San Basilio

San Basilio

San Basilio is a comune in the Province of Cagliari in the Italian region Sardinia, about north of Cagliari. As of 31 December 2004, it has a population of 1,371 and an area of ....

. It also correspond to an medieval curatory (province) of the Giudicato of Cagliari. It is characterized by a series of plateaus divided by steep valleys, crossed by the Flumendosa.

Sights include a Megalithic necropolis near Goni, belonging to the culture of Ozieri and including several Domus de Janas

Domus de Janas

Domus de Janas are a type of pre-historic chamber tombs found in the Mediterranean area, but typically in Sardinia. They consist of several chambers quarried out by the Ozieri and Beaker cultures, resembling houses in their layout.Built between 3400 and 2700 BC, more than 1000 of the rock-cut...

, and a Holy Pit of Funtana Coberta

Funtana Coberta

Funtana Coberta is a holy pit in Sarrabus-Gerrei, a traditional subregion of Sardinia, Italy. Dating to c. 1200-850 BC, it is included in the territory of Ballao, in the province of Cagliari...

, at Ballao.