| Location | |
|---|---|
  Kelsey Lake Diamond Mine Location in Colorado | |
| Location | Larimer County, Colorado, 25 miles south of Laramie, Wyoming |
| State | Colorado |
| Country | United States |
| Coordinates | 40°59′38″N 105°30′18″W / 40.99389°N 105.50500°W |
| Production | |
| Products | Diamonds |
| History | |
| Opened | 1996 |
| Closed | 2001 |
Kelsey Lake Diamond Mine is a defunct diamond mine in Colorado, USA. It is located in the State Line Kimberlite District, near the Wyoming border, and consists of nine kimberlite volcanic pipes, of which two were open pit mined.
At the time it was operating, it was the United States' only modern diamond mine, and only the second commercial diamond mining operation in North America, the first being in the Crater of Diamonds State Park, Arkansas which was mined in the early 1900s.[1]
- ^ "Diamonds Mining, North America (with picture of mine site)". American Museum of Natural History. Archived from the original on 21 December 2010. Retrieved 6 July 2015.