Premium Red Saffron from Spain. Sierra Quality 100% Pure Grade A Saffron. All vivid red stigmas for rice dishes, desserts and teas. No preservatives or additives. Saffron is considered to be the most valuable spice by weight in the world. Saffron is derived from the flower of Crocus Sativus commonly known as Saffron Crocus. Saffron is valued for its taste, fragrance and golden yellow color it imparts to the dish. It is harvested by hand in a labor intensive method making the production costly.