La Geoda de Pulpí

La Geoda Gigante - Geode of Pulpí - Geode at the Mine of Sierra del Aguilón

Useful Information

Location: Pulpi, Sierra del Aguilón, Almeria province.
(37.381986052021400, -1.699117748863557)
Open: All year Mon-Sun 9-14, 16-21.
Visit only with prebooked ticket.
Fee: Adults EUR 22, Children (8-16) EUR 10, Seniors EUR 15.
Inhabitants of Puli: Adults EUR 10, Children (8-16) EUR 5.
Groups (15+): Adults EUR 15, people EUR 225.
Tickets sold online
Classification: MineSilver Mine SpeleologyGeode gypsum (selenite) crystals
Light: LightIncandescent Electric Light System
Dimension: Geode: L=8 m, H=2 m.
Crystals: L=2 m.
Guided tours: D=90 min, St=162. Español - Spanish English
Bibliography: Ángel Fernández-Cortés, José María Calaforra, Javier García-Guinea (2006): The Pulpí gigantic geode (Almería, Spain): geology, metal pollution, microclimatology, and conservation, Environmental Geology, Volume 50, Number 5, July, 2006, pp 707-716.
A. Canals, A.E.S. Van Driessche, F. Palero, J.M. García-Ruiz (2019): The origin of large gypsum crystals in the Geode of Pulpí (Almería, Spain), Geology (2019) online
Address: La Geoda de Pulpí, Empresa Municipal de Suelo de Pulpí SL (Cif: B04534863), Tlef. +34 950 96 27 27. E-mail:
As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
Please check rates and details directly with the companies in question if you need more recent info.


1840 begin of contemporary mining with the use of trenches and cuts into silver galena (lead sulphide).
1870 begin of iron mining.
1890 after a decline of mining the Mina Rinca opened by the Marín Menu family revitalized the mining.
1939 mine after the civil war abandoned.
1999 geode discovered.
AUG-2019 opened to the public.


A geode is a term of mineral collectors, meaning a bubble in the rock which is filled with minerals. Because of the hole in the rock, water seeping through the pores of the rock transports minerals to the hole and in the mineral rich water crystals start to grow. Generally geodes with a few centimeters in diameters are sold, items with half an meter are really expensive. But sometimes a geode with a size of several meters is discovered, and actually any natural hole in the rock which is big enough to be entered by a human is a cave, thats the definition of the term.

At the Mina Rica the geologist Javier Garcia-Guinea discovered a natural geode which is 8 m long and about 1.8 m in diameter. It contains selenite (gypsum) crystals which look like blades of glass, transparent and up to 2 m long. In average they are 50 cm long. He named it Geoda Gigante.

The geode is a unique natural wonder and it is protected by law, on the other hand there is the urge to develop it for tourism, make it accessible for tourists. This is both an economic and an educational topic. Unfortunately the crystals are very delicate, easily shattered, and destroyed even by minimal changes in humidity and carbon dioxide content of the air. So originally the development for tourism was not possible and there was a plan to create a replica. At the end the geode was developed and is now open for tourism. The operators state that temperature, humidity and Co2 in the air are monitored accurately and the number of visitor is limited so it will not destroy the crytsals, but this is obvioulsy