TUCSON, Ariz.-- Thousands from near and far came out to the Gem and Mineral Showcase’s opening weekend, but there was one geode that was getting more attention than others. Among the rock-solid ...

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 ...

In 2019, Michal Mael brought a massive geode to the Kino Gem Show. It weighed thousands of pounds and had a heavy door attached — for everyone who has ever dreamed of being encapsulated by amethyst.

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 ...

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 ...