1 of 12
Mine Tunnel
Modern tunneling technology has replaced the old means of picks and shovels in the opal mines of Coober Pedy, South Australia. After tunneling, the sandstone will be "noodled"—or searched—under UV light in pursuit of the gemstones.
Photograph by Daniel R. Westergren

Coober Pedy, Land of Opals and Underground Living

See photos of Coober Pedy, one of the world’s largest opal sources.

January 6, 2016
  • National Geographic Expeditions
Travel with National Geographic

Sale Extended - Save up to $20!

PLUS, for a limited time, get bonus gifts and issues with all Nat Geo subscriptions.