A marble countertop is a type of kitchen or bathroom countertop that is made from natural marble, a metamorphic rock that is formed from limestone under intense heat and pressure in the earth’s crust. Marble is composed primarily of calcium carbonate, which gives it its characteristic white color, but it can also come in various colors and patterns, including shades of gray, pink, green, and black. Marble countertops are known for their unique beauty and elegant appearance, with classic veining and a polished finish. However, because marble is softer and more porous than other types of natural stone, they require more care and maintenance than other types of countertop materials to keep them looking their best.