Such alteration is easily visualized, often showing a light pink color on a rock surface. It can be used as an indicator of ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Gold nuggets have long fascinated treasure hunters and geologists alike ...

We can't usually feel them, but dozens of earthquakes occur every day—and some of them are using mundane minerals to make glittering gold. Researchers have found that tectonic shifts put just the ...