Arkansas Crater of Diamonds: Great Article

[Old Bookaroo]

I found this article to be very, very interesting:

http://www.smithsonianmag.com/history-archaeology/The-Curious-Case-of-the-Arkansas-Diamonds.html

I just have one question. In all the photos of Arkansas diamonds I've seen, it's usual to include a coin for size comparison. Why doesn't anybody ever use a State of Arkansas quarter? The last photo I saw was an official State of Arkansas photo and they used an "out of state" quarter...

Good luck to all,

~The Old Bookaroo