Which region is known for producing jet?

The region known for producing jet is England, particularly the area around Whitby in Yorkshire. Jet is a type of lignite, a precursor to coal, and has been used historically for making jewelry and various ornamental objects. The Whitby jet is well-known for its deep black color and smooth texture, which were particularly favored during the Victorian era, as it was often used in mourning jewelry. The unique geological conditions of the region contributed to the formation of jet from decayed wood over millions of years, differentiating it from similar materials.

While other regions may produce various types of gemstones and materials, England's historical significance and the quality of jet found there set it apart as the primary source recognized for this material.