The most expensive marble countertops are often made from rare and luxurious varieties of marble. Some of the most expensive options include Calacatta marble, Statuario marble, and Carrara marble that come from Italy. These marbles are known for their stunning white backgrounds and intricate veining patterns. The price of these countertops can vary depending on factors such as quality, slab size, and installation costs, but they can range from $200 to $400 per square foot or even higher.