Bluish-gray molybdenite, a molybdenium-sulfur mineral, in quartz from Wisconsin. More than 5,000 minerals have been identified on Earth, more than half of which are classified as rare, meaning they’ve ...

Granite colors range the spectrum from white to black to pink, but what makes a single rock type so variable? Here we will discover what makes each granite a different color, what that tells us about ...

Think evolution is something that happens only to plants and animals? Think again, say scientists who point out that evolution — change through time — happens in the mineral kingdom as well. As our ...