Restored open-air pyrite mining heritage site near Gavorrano with surviving iron headframes and a preserved multi-storey ore-treatment plant.
The Miniera Ravi Marchi is a pyrite mining site located at the hamlet of Ravi, three kilometres from Gavorrano in the Tuscan Maremma. Mining activity in the area began in 1910 when the Marchi company acquired the concession and, from 1912 onwards, began productive extraction across three ore bodies: Ortino, Radini, and Vignaccio. The Ortino and Radini deposits were exhausted by the early 1930s, after which the Vignaccio zone became the focus of operations.
A first ore-treatment plant was constructed in 1918, enlarged in 1925, and replaced by a larger five-storey lavery in 1955. In 1914 a cable ropeway some four kilometres long connected the site to Gavorrano railway station for ore transport. The Marchi concession passed to the Montecatini company in 1965, after which a new underground gallery linked the workings directly to the main Gavorrano mine plant, making the Ravi surface installations redundant.
The site was restored between 1999 and 2003, and a formal museum trail was inaugurated in September 2012. It forms part of the Parco minerario naturalistico di Gavorrano within the broader Parco tecnologico e archeologico delle Colline Metallifere Grossetane.
The hamlet of Ravi, on the outskirts of Gavorrano in the Province of Grosseto, sits within the Colline Metallifere district, a landscape shaped by centuries of metalliferous extraction. The Gavorrano pyrite deposit as a whole was discovered in 1898 by local ex-Garibaldino Francesco Alberti with the support of geologist Bernardino Lotti, and mining rights were acquired successively by the Praga firm, the Unione Italiana Piriti from 1905, and then by the Montecatini company under Guido Donegani, which took control of the main Gavorrano concession in 1910 and would manage it until the final closure on 30 June 1981.
The Ravi area specifically became the subject of mining activity from 1910, when two separate companies operated in close proximity: the Montecatini, which sank shafts on its own adjacent concession, and the smaller Marchi company, whose concession — known as 'le Isole Marchi' — was notably compact in extent. From 1911 Montecatini built a cable ropeway to transport ore from its Ravi workings to the processing plant outside Gavorrano. Simultaneously the Marchi company began sinking the Ortino shaft, installing a crushing plant alongside it, and started on the Radini shaft; the Ortino crushing installation was enlarged in 1915. Full productive output from the Marchi operation began in 1912.
Through the 1910s and into the 1920s extraction was concentrated in the Ortino and Radini ore bodies. As these masses approached exhaustion — Ortino and Radini being worked out roughly by the late 1920s to early 1930s — the Vignaccio zone emerged as the most productive remaining mineralisation within the Marchi concession. Two shafts were sunk at Vignaccio, and a first ore-treatment lavery was constructed there in 1918–1920. This lavery incorporated a crushing section with jaw crushers, roller mills, and shaking screens driven by 500-volt AC electric motors, and a washing section; it could treat some 40 tonnes per hour and required fourteen operators. The installation was enlarged around 1925. Production continued at Vignaccio through the 1930s and 1940s.
In 1914 the Marchi company activated a cable ropeway approximately four kilometres in length to connect the mine installations to Gavorrano railway station, enabling ore dispatch. In 1946 the terminal station at Gavorrano Scalo was entirely rebuilt. The ropeway was dismantled in 1959 and replaced by road haulage, with new ore storage silos constructed at the mine end. Rail haulage within the site — using locomotives and wagons — was later supplemented and then superseded by conveyor belts.
From 1950, two further ore bodies within the Marchi concession were identified: Orsinghi and Quercetana. These became the focus of continued extraction after the Vignaccio mineralisation had been worked out, while the Vignaccio zone remained the location of the surface treatment infrastructure. In 1949 the iron headframes at Vignaccio I and Vignaccio II (the latter also known as Nuovo) were constructed. In 1955 construction began on a new, much larger lavery at Vignaccio: a five-storey reinforced installation associated with a flotation plant for slime recovery, served by a mechanised skip-loading system on an inclined track from the Vignaccio I shaft exit. The new lavery could treat 60 tonnes per hour and the flotation plant three tonnes per hour, requiring only five operators in place of the fourteen of the earlier plant.
In 1965 the Marchi concession was sold to the Montecatini company, bringing the entire Gavorrano–Ravi mining district under single management. After the acquisition, a new underground gallery was driven to link the former Marchi workings directly to the main Gavorrano mine and its central treatment plant, rendering the Ravi surface installations redundant. The Vignaccio surface plant was decommissioned in 1965. The main Gavorrano mine continued under Montecatini until the final closure of all extraction on 30 June 1981.
After closure, the Ravi Marchi site attracted attention for the completeness of its surviving surface infrastructure — an unusually intact illustration of the entire pyrite extraction and treatment cycle within a compact area. Recovery and heritage consolidation works were carried out between 1999 and 2003. The two iron headframes at Vignaccio I and Vignaccio II, the five-storey 1955 lavery structure, associated conveyors, and ore transport infrastructure were all restored. A formal open-air museum trail ('Percorso Museale Miniera Ravi Marchi') was inaugurated on 15 September 2012 as part of the Parco minerario naturalistico di Gavorrano, itself a component of the Parco tecnologico e archeologico delle Colline Metallifere Grossetane. The site is managed by the Parco delle Colline Metallifere and is open to guided visits by appointment, complementing the underground Museo Minerario in Galleria at the main Gavorrano Parco delle Rocce site. Cultural events including open-air cinema screenings and theatrical performances have been hosted at the Ravi Marchi area.