Arkansas is the US state out of which come the most diamonds. The United States just doesn't have the "right geology" to have diamonds as a natural resource. Diamonds usually come from or appear near (having washed out of) kimberlite pipes. The geology of the US is broad and breathtaking, but does not include much in the way of these unique geologic structures.
You can find diamonds in Arkansas, in the Crater of Diamonds State Park.
Nevada.
North Carolina
Minnesota.
Arkansas is the home to Crater of Diamonds State Park, the only option for finding diamonds in any US state.
The US
You can find diamonds in Arkansas, in the Crater of Diamonds State Park.
Ohio
Nevada.
Kentucky.
Texas
Michigan
Kentucky produces the most gold in the Untied States.
California!
South Carolina
North Carolina
Texas