AS you can probably imagine, the precious metals industry is big business – the clue is in the name: precious.

So, with all manner of multinational companies out to find the world’s natural treasures, Dallas Campbell and Ellie Harrison may have their work cut out tracking down some of their own.

However, the pair are no strangers to a challenge, having presented numerous science and wildlife-based programmes between them.

That is what this new two-parter is all about – science and nature combine as the duo travel the world in search of truly spectacular hauls.

These range from gems, minerals and metals to the lucrative by-products of marine wildlife.

Pearls we all know about, and indeed Dallas goes freediving Down Under in search of some particularly fine specimens, but there is also the small matter of ambergris.

This strange and pungent substance begins to take form in a sperm whale’s stomach, and can prove to be a lucrative find, thanks