Franklin Furnace, also known as the Franklin Mine, is a famous mineral location for rare zinc, iron, manganese minerals in old mines in Franklin, New Jersey, US. This locale produced more species of minerals (over 300) and more different fluorescent minerals than any other location. The mineral association (assemblage) from Franklin includes willemite, zincite and franklinite.
During the mid-to-late 19th century the furnace was the center of a large iron making operation. Russian, Chilean, British, Irish, Hungarian and Polish immigrants came to Franklin to work in the mines, and the population of Franklin swelled from 500 (in 1897) to over 3,000 (in 1913).
The Furnace mine which was adjacent to the actual furnace, was a 120+ foot vertical shaft just under Franklin Falls.
- Kemp, James Furman (1901). The Ore Deposits of the United States and Canada. New York: Scientific Publishing Co. pp. 250–257.
- Truran, William R. Images of America: Franklin, Hamburg, Ogdensburg, and Hardyston. (Charleston, South Carolina: Arcadia Publishing, 2004).