Why is Saffron the Most Expensive Spice in the World?

Saffron is considered the rarest and most expensive spice in the world, costing more than $500 an ounce. Why is this tiny spice so expensive? It has to do with how much labor is involved in harvesting the saffron crocus flowers where the spice comes from.

Saffron has been around since the time of the ancient Greeks and Romans, who used it as a perfume, and the Chinese…