Alex is a senior associate editor at Discover. Before he joined the Discover team in 2019, he worked as a reporter for the Half Moon Bay Review and as a staff writer for Houston’s Texas Medical Center ...

Boulder, Colo., USA: The geode of Pulpí is an 11-meter hollow ovoid with crystal-paneled walls. It is like those familiar couplets of stone interiors covered with bright crystallites, but so large ...

The geological history that led to the formation of giant crystals and a 36-foot geode has been revealed by scientists. By looking at the abandoned mine where the geode of Pulpí was found, they were ...

Exploring the Pulpi Geode, the world's largest crystal cave in Spain, The Pulpí Geode in a gypsum mine in Pulpí, Spain is the world's largest geode, measuring 8 meters in length. Discovered in 1999, ...

An abandoned mine in Spain hides a sparkling treasure – the world's largest geode, a natural crystal phenomenon that has stunned scientists. In abandoned silver mine in Pulpí, in Spain's south-eastern ...

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Discovered in 1999 during mining operations in the Mina Rica (the ...

Pulpí, Spain, Aug 4 (EFE).- The Pulpí Geode, the largest in Europe and second in the world, has opened to visitors 20 years after being discovered in southern Spain. The crystal cave is a major ...

Any geode might make us wonder: What geologic forces form these hollows lined with crystals? But the Pulpí Geode, discovered in an abandoned Spanish mine, takes wonder to a different scale. One of the ...