Commercial diamond production is not common in any US state.
The US state of Pennsylvania is not known for its diamond mines.
Herkimer County, New York State
Fortunately, there haven't been any for us to step on.
what r u talkin about there is no toys r us in Pokemon diamond (or any other Pokemon)
YES there are lots.
A list of uranium mines in USA is at the link mentioned.
There are a number of coal mines in the US that are quite large and profitable. The vast majority of these mines are located in Wyoming, which has the largest coal extraction rates of any state.
You can dig for gemstones in certain mines around the country and around the world. The type of gemstone you can find depends on where you are located.
Many mines of many kinds, producing many things, are located in the USA.
yes, there is,Added: I don't believe that ther are any operaing in a commercial application.
Any diamond is worth whatever someone will pay you for it. Today, on Blue Nile, you can purchase a diamond of this carat weight and pay between US$848 and US$3,103 , depending on the colour and clarity that you want.