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 ...

A pair of diamonds that formed hundreds of kilometers deep in Earth’s malleable mantle both contain specks of materials that ...

Shiny, crystallized, colorful, holding clues to the Earth's past, and, in some cases, worth a small fortune, rocks and gemstones fascinate many. Keith Harmon has been attracted to the beauty and ...

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.

As summer days are in full swing, Oklahomans are taking part in adventures across the state. For all you that nerd out over that cool rock you found, and we say nerd out in the most loving way ...

The Loup Valley Gem and Mineral Society's rock collections aren't just about rocks, charter member Cheryl Barnholdt explains ...