This mine was a real wonder of engineering, and the water supply and drifts had to be carefully managed to keep it in operation. In fact, it didn’t close due to lack of gold, but instead closed with the fall of the Roman Empire.

New theories have been developed and they may lead to new discoveries and give prospectors some new insight on where to look for diamonds.

The Reno Masonic Lodge was built along the railroad tracks back when Ulysses S. Grant was president and shortly after the Comstock Lode of gold and silver was struck in Virginia City.

...two jadeite locations in California have been thoroughly researched by geologists. There are no doubt others that lie in wait.