The world's toughest treasure hunters push their bodies and bank accounts to the limit 
on a quest to strike it rich, hunting the legendary Queen of Gems - Opal. 
Australia produces more than 90% of the world’s opals. 
Hidden beneath outback desert plains lies a hidden bounty, 30 million years in the making, 
waiting to be discovered. 
Opals are one of the most valuable gemstones on the planet – one stone alone can fetch a 
million dollars – and it's the dream of striking it rich that drives these crews to push 
their bodies and bank accounts to breaking point