Caviar is a delicacy and is considered as one of the most energizing, and expensive foods in the entire world and, for this very reason, today, it is dubbed to be the black pearl. Caviar is actually the roe of a certain kind of sturgeon fish from Acipenseridae species in the Caspian Sea and Black Sea. The Iranian caviar is considered as the most valuable sort of its kind in the entire world thanks to its being kept away from contaminating chemicals. 

It is said that the people of the Persian Empire were the first to taste caviar, believing it had medicinal properties and was a source of energy (a widely-held belief still today).