Arkansas....the diamond mine is known as the Crater of Diamonds and is open to the public for a small daily fee. Everything that you find is yours to keep. The largest diamond ever found in the United States was found there. The nearest town is Murfreesboro.The Crater of Diamonds is a state park.
Arkansas
Oregon
Today on Blue Nile, you can purchase a one carat SI1 diamond and pay about US$4,759; and a one carat VVS1 diamond and pay about US$12,252.
Any diamond is worth whatever someone will pay you for it. Today, on Blue Nile, you can purchase a diamond with roughly this description and pay between US$2,392 and US$2,633, depending on the cut and excellence of the cut that you want.
Washington DC is part of the US but not a state, it is a district.
The US state of Pennsylvania is not known for its diamond mines.
Arkansas.
Herkimer County, New York State
Arkansas.
Arkansas
You need either an iron or diamond picaxe to mine gold ore
Delaware
Idaho is known as the "Gem State"
Commercial diamond production is not common in any US state.
Not any longer. There have been several small ventures but Kelsey Lake Diamond Mine went bankrupt back in the late 90's. Located in Colorado it debunks the idea that Crater of Diamonds State Park in Arkansas is the only place in the US where diamonds have been found or mined.
President Lincoln held the public offices of: US President US Congressman from Illinois and State Congressman or State Assembly in Illinois.
Herkimer County, New York State