The largest open-cut diamond mine on the planet.

The chances of any reasonably well-informed exploration project resulting in a diamond mine are lower still, at 0.05 per cent.

In a breathlessly exciting second series, he also flies over a giant open-cast diamond mine, eats frozen raw horsemeat and goes on a remarkable scientific expedition.

Somewhere out there, in a desolate corner of an unexplored wilderness, lies the next great diamond mine.

They fetch the highest average price per carat of any kimberlite diamond mine in the world, at $1,930 last year.