Saffron is most expensive spice of the world in terms of weight and costs USD $25,000 per kg? Its native to Central Asia and Northern India. A saffron is mere stigma of the Crocus Sativus flower and large quantities of these flowers are required to be harvested in order to yield a viable supply of saffron threads, since each flower only has three stigmas.
Saffron is grown mainly in Spain, Italy, Greece, India and Iran with the best quality saffron originating from Kashmir.
Top five spices in terms of cost