Patrick and Kirsty unearth a giant amethyst cluster; Pete and Kyle struggle to extract the fragile crocoite crystals; the Rockhounds need a haul of topaz crystals to pay their bills.

Patrick faces extreme temperatures to recover Australia's biggest ever, million-dollar amethyst cluster; Pete and Kyle struggle in frigid conditions.

Patrick and Kirsty search for rare aquamarine crystals on their remote Queensland lease; Frankie and Ebriony face-off against wild pigs and dingoes.

Hugh and Jarrin need a miracle to keep their mining operation alive; Patrick and Kirsty are desperate for an $80,000 payday of high-grade crystals.

The Rockhounds need a $11k miracle to turn things around; Kirsty and Patrick must find rare ocean kyanite crystal to have a chance of recouping their debt; Kyle Archer strikes a $200k payday of mookaite crystal.

Pete and Kyle take the biggest gamble of their season, hunting valuable tourmaline crystals; Hugh and Jarrin tackle the world's only stichtite quarry; Patrick and Luke explore not far from where a $250,000 crystal was unearthed.