- Copiapo, Atacama, Chile1
- Copper Mine Hill, Cumberland, Providence County, Rhode Island, United States1
- Cornwall, Lebanon (Dauphin) County, Pennsylvania, United States1
- Cornwall, Lebanon County, Pennsylvania, United States1
- Cuba1
- Cumberland County, Pennsylvania1
- Delaware County, New York, United States1
- Derbyshire, England , United Kingdom1
- Drammen, Buskerud County, Norway1
- Dundas, Zeehan District, Tasmania, Australia1
- Durham1
- East Hampton (Chatham), Middlesex County, Connecticut, United States1
- East Indies1
- East Lothian, Scotland1
- Ehrenfriedersdorf, Saxony, Germany1
- England (probably)1
- Europe1
- Filipstad, Varmland County, Sweden1
- Florence Province, Tuscany, Italy1
- Florence, Tuscany, Italy1