There was one in North Carolina in about l897 but surely that has all gone over to (Trap Rock) unproductive minerals. Herkimer"s mine in upstate New York produced quartz Crystals, not the Hard Rock Mohs-l0 stuff.
The US state of Pennsylvania is not known for its diamond mines.
Arkansas.
Herkimer County, New York State
Arkansas.
California.
Heigh Ho
There is no mine at Crater of Diamonds State Park in Arkansas, but visitors can dig for diamonds and keep whatever they find.
Arkansas's state gemstone is diamond. The first diamond mine in North America was found in Arkansas in 1906, and the state continues to be known for its diamond mines and gemstone production.
Arkansas is known for its diamond mine, specifically the Crater of Diamonds State Park where visitors can try their luck at finding their own precious gemstones.
it is the only state contains a diamond mine
The Diamond Mine was created in 2005.
You can mine diamonds in the Arkansas Diamond Mine, in Murfreesboro, Arkansas, as below.