I was three and tried it, but I got tired quick. It was hot sweaty and work. I was on vacation.
Supposedly, that is the only place in the world where you can freely explore for diamonds with a reasonable chance of finding one, and if you find it, you get to keep it. Other than the rarity and novelty of an American diamond, I don’t think that any of size are really of gem quality (very valuable), though. Still it will be worth a good buck.