Papakōlea Beach on the Big Island gets its stunning emerald hue from a mineral called olivine.

The accepted view of Mars is red rocks and craters as far as the eye can see. That’s much what scientists expected when they landed the rover Perseverance in the Jezero Crater, a spot chosen partly ...

Diamonds present at the birth of the Okavango Delta have a lasting connection to this landscape and are playing a unique role in its conservation today. 3:41 Geological time and tectonic forces have ...

In a recent study, geologists say Michigan is home to the oldest known rock in the nation. Watersmeet gneiss is found in Michigan's Upper Peninsula. Minnesota's Morton gneiss previously held the title ...