Expensive caviar is a delicacy made from the roe of sturgeon fish, and the most expensive type is BELUGA caviar, which is produced from the eggs of the BELUGA sturgeon. BELUGA caviar is identified by its large, light-colored eggs and is considered to be the finest and most luxurious type of caviar. It is highly sought after and can be very expensive, with prices ranging from hundreds to thousands of dollars per kilogram.