The most expensive spice in the world is saffron. Derived from the flowers of the Crocus sativus plant, also known as the "saffron crocus," saffron consists of the plant's red stigmas and style. Harvesting saffron is labor-intensive, requiring around 150,000 flowers to produce just a single kilogram of the spice; this contributes to its high price, which can range from $500 to $5,000 per kilogram. Saffron is celebrated for its distinctive flavor, color, and aroma, widely used in culinary dishes, as well as in traditional medicine and cosmetics across various cultures.