Portland Stone is a type of limestone that is quarried on the Isle of Portland in Dorset, England. It is known for its light color, typically ranging from white to pale grey, and its fine grain. This stone has been used for centuries in construction and is particularly famous for its durability and weather resistance. The stone has been a popular choice for many notable buildings, including St. Paul's Cathedral in London and the British Museum. Its unique properties make it suitable for both interior and exterior applications, contributing to its reputation as a high-quality building material.