So just how is it made, and what makes it so expensive? Phan Thi Thuan's family ... But while the insects require careful looking after, they do most of the hard work themselves.

The next most expensive spice? Vanilla ... To harvest the saffron, you need a lot of hand works to pick up the flowers, separate — saffron is dehydrated or dry stigma. The stigma is the female ...

That’s as many as 300,000 flowers! Caviar is the pickled roe ... According to the Guinness World Records, the most expensive caviar recorded is from an aged (possibly 100 year-old!) ...