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 ...

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 ...

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 ...

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 ...

BALLY – They form deep in the earth over thousands of years, but today they will be on display in the air above ground. Geodes – hollows in underground rocks that are filled with crystals caused by ...

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 ...