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 ...

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 ...

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 ...

TUCSON (KGUN9-TV) - The world's largest amethyst geode debuted in public for the first time in Tucson during the 2016 Tucson Gem, Mineral and Fossil Showcase. It measures 13 ft long, 5 ft high, and ...

This week at the Des Moines County Historical Society, the artifact of interest is an amazing example of a designated state symbol. This item is a large geode, the Iowa state rock, on display at the ...

The development of plans for a large geode was clearly the most challenging assignment for McNamara Alumni Center's structural engineers, Minneapolis-based Meyer, Borgman and Johnson (MBJ). The ...

A 15 million-year-old, 6,000-pound paperweight is holding down the corner at 1212 Tennant Way. "We haven't found anybody yet who has seen one that big," said Julie Coonc of the gigantic geode she and ...