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 ...

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Researchers have found evidence of the oldest known use of ...

Silver protected against evil. The sun turned trolls to stone, and alchemists hunted for the stone that gave eternal life. Why have stones fascinated ...