Precious opal found in the Williams opal mine near Coolgardie in Western Australian. (Government of Western Australia) The red dirt in central Australia might be a close mimic for the red surface of ...

What is millions of years old and is trapped inside of a rare gem? Not sure? We aren't either. But that's exactly the question a local gem dealer is trying to answer after discovering an unidentified ...

The beautiful optical properties of the gemstone opal are the result of tiny amounts of uranium present when the stones were formed, say researchers in Australia. They claim that their work could lead ...