Kirsten travels to Lightning Ridge, Australia, home to the world's richest deposit of black opals. She climbs to the top of the Sydney harbor bridge, checks out an underground opal mine, and heads deep into the bush, hunting opals.

Kirsten is treasure hunting for gold in Australia's Golden Triangle. After a look at what life was like during the Australian gold rush, she goes modern with a metal detector. She brings her gold to "The Mining Exchange" for a cleaning and appraisal.