One spring day last year, Mark Longman was hiking around Castlewood Canyon State Park with questions that mounted with every boulder and rock wall he passed. A career geologist and longtime Denver ...

WATERLOO — When you come across a conversation between Ray Anderson and Dave Malm, the best thing to do is sit and listen. Both rock enthusiasts, it’s easy to picture the conversation between them ...

A.K. Miles of Salem spent summers as a little girl traveling the Pacific Northwest with her grandparents, collecting rocks and helping her great-grandfather cut and polish them in his lapidary shop.

The astonishing story behind a 100-million-dollar gemstone discovered by chance in Sri Lanka.

Every year, something extraordinary happens in Tucson. Beneath the backdrop of rugged mountains and under an impossibly blue sky, the Tucson Gem and Mineral Show transforms the city into a global hub ...

For the first time in 23 years, Geoffrey Notkin isn’t gearing up for Tucson’s massive gem showcase. Notkin, owner of meteorite company Aerolite Meteorites, started attending the gem show first as a ...