Sapphire hunters work under extreme conditions in Central Queensland.
Three groups of sapphire hunters encounter big problems underground.
Deep in the Australian Outback lie some of the largest gems on the planet.
The Richardsons hunt for fresh sapphire grounds.
A tangle with a jack hammer could cost the Mifsuds a huge sapphire.
Huge floods and a mini tornado hit the Gemfields.
It's almost the end of the mining season.
