Gold has inspired and enchanted humans for thousands of years.
It's helped to end wars - and to start them! - and adorns many of the buildings and works of art we place the greatest value on.
Why? Who decided this humble, noble metal lying in the earth's crust would become one of the most obvious and enduring symbols of wealth and beauty humans have?
Penelope Brothers is a professor at Auckland University, and also does work with the Mcdiarmid Institute.