All About The Pulpi Geode In Spain, World’s Largest Crystal Cave

The Pulpi Geode, also known as the "Giant Geode of Pulpí," is an extraordinary geological formation which is about 165,000 years old in Pulpi, in Almería. It was discovered in December 1999 by Javier Garcia-Guinea of the Grupo Mineralogista de Madrid. The geode is one of the giant geodes ever documented in the world, with a cavity volume of about 390 cubic feet and walls adorned with gypsum crystals nearly seven feet long.

How Geodes Form

Geodes form as mineral-rich solutions fill cavities, and minerals crystallise over time. There are two processes: volcanic and sedimentary. In the volcanic process, gas bubbles in lava form cavities. Mineral-rich groundwater seeps in, carrying dissolved minerals. Geode shape is determined by bubble shape. In the sedimentary process, geodes form in gaps between deposit layers. You can make your geodes by soaking half an eggshell in salt water for 3-7 days.

Discovery Of Pulpi Geode

In December 1999, while conducting mining operations at the Mina Rica lead and silver mine, miners discovered the Pulpi Geode. The geode was found in a hollow cavity that was stumbled upon while drilling a tunnel. The cavity has a volume of approximately 390 cubic feet and is adorned with impressive gypsum crystals almost seven feet long. Scientists have been fascinated by the geode's unique dimensions and are eager to learn how it was formed.

Size And Dimensions

The Pulpi Geode is enormous, measuring around 8 metres in length and 2 metres in height. It has a unique elliptical shape, and its interior is lined with large, translucent crystals. The geode is an egg-shaped rock with an encrusted and shimmering crystal interior, primarily composed of colourless and transparent gypsum crystals.

These crystals are enormous, with some reaching up to 2 metres in length. Their purity and clarity contribute to the geode's beauty. The crystals are made of gypsum minerals and are so transparent that they look like massive spears of ice. Some of the crystals can be over 6 feet long.

Conservation Of Pulpi

Efforts have been made to preserve and protect the delicate crystals of the Pulpí Geode. A controlled environment is maintained within the visitor centre to ensure the appropriate conditions that ensure its longevity. The discovery of the Pulpí Geode was considered a significant highlight in Spain's geological heritage.

As soon as it was found, conservation projects were initiated, including legal protection and tourist projects. The geode was sealed off for several years to prevent vandalism but opened for public tours in August 2019. Unfortunately, vandals damaged the geode by the end of 2021. However, the damage was not as severe as initially thought, and the geode was soon reopened for tourists.

Tourism At Pulpi

The Pulpi Geode is a well-known tourist attraction that has been made accessible to the public. In 2019, a visitor centre named "Geode of Pulpí" was opened, offering guided tours to explore the geode. The visitor centre provides information about the geological processes that contributed to the geode's formation and its discovery.

Visitors can appreciate the beauty of this natural wonder and gain knowledge about the geological processes that shaped it. The site has received international recognition and has become a significant spot of interest for geologists, mineral enthusiasts, and tourists worldwide.

The Information

The Pulpí geode, located in the Mina Rica of Sierra del Aguilón, can be visited from Monday to Thursday, from 9 am to 2 pm and from 4 pm to 7 pm, and on Fridays, from 9 am to 2 pm. Visitors can only go in groups of 15 people because of the fragility of the mine. However, the fragile Pulpí geode can only be seen from the outside, and entry admittance inside is only for scientific purposes.

Visitors with certain medical conditions must refrain from the mine, and comfortable clothing and closed, flat shoes will be your friends inside. You can find the tickets on their official website.