It was abandoned in 1970, when the tunnels flooded and mining started on lignite deposits near the surface.

"If there was an economically viable source of diamonds in the region, mining would have started," he said.

The mining started in the 1640s and ended by 1652 and was said to be of no value.

The ore deposit was discovered in 1793, but mining did not start until 1809.

Agriculture and mining have started to take importance over the natural scenery.

Coal was found in the area, and mining started in 1797.

As mining started to decline, so did the population, reduced to 1,730 people by 1851.

Regular mining started in 1820, led by an agency house, Alexander & Co.

In 11th century, the mining of Tada silver-and-copper mine started.

The mining of silver started in the 11th century.