• anywhere you like, providing it is not government whether you find any, is another question. There are very few places in the US where diamonds exist. Here is a clue: UNITED STATES: Although numerous kimberlites and lamproites are scattered from New York to Wyoming and Michigan to Arkansas, diamond discoveries and mining have been minimal in the United States, restricted to Arkansas and, now, Colorado. Near Murfreesboro, Arkansas, from what is now known to be a lamproite pipe, more than 100,000 stones averaging 0.25 carat each were produced between 1907 and 1933. Now Crater of Diamonds State Park, the locality is a stop for hobbyists and tourists. The "State Line Kimberlite District" along the Colorado-Wyoming border is home to the only operating diamond mine in the U.S., started at Kelsey Lake, Colorado, in June 1996. The largest diamond found so far is 28.3 carats, and about 25% of the 20,000-carat annual production is of gem quality. Otherwise, hop a plane to Australia. We have lots of diamonds and other gemstones.
  • 7-14-2017 Singwell covered it pretty well. I would just add an old rockhound's trick: Walk east in the morning and west in the afternoon. That way you catch the glint of shiny rocks.

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