Patrick Gundersen's delicate operation to extract Australia's largest smoky quartz cluster is derailed by hard ground, while Jarrin and Hugh's stichtite dig forces them to resort to more explosive measures. Kyle's relationship with his girlfriend, Jillian, is on the rocks as the pair futilely hunt for Killiecrankie diamonds.

Amidst season-ending rain, Jarrin and Hugh hunt for anything and everything in the walls of their tired mine, while Patrick Gundersen's hopes of hitting season target lie within a massive column of potentially crystal-bearing rock. Desperate for cash, The Neils return to ‘Topaz Mountain', risking life and limb against deadly boulders.