Lydian stone is a rare and valuable material that has a distinctive metallic sheen and is often used in jewelry and decorative objects. It is also known by several other names, including lydite, basanite, and blue stone. The word "Lydian" refers to the ancient kingdom of Lydia in Asia Minor, where the stone was first discovered and mined. Lydite or basanite are terms used to describe rocks that are made up of the same material as Lydian stone, while blue stone is a common name given to stones with a similar blue-grey coloration. Despite their differences, these names all refer to the same or similar materials, which are prized for their unique appearance and properties.