Ichinokawa Mine
Ehime Prefecture, Japan
The Ichinokawa antimony mine (Ichinokawa kōzan) was a prominent source of antimony in Saijō, Ehime Prefecture, Japan. Prized high-quality stibnite crystals produced at the mine can be found in museums and private collections around the world.
Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).