Caesar's Palace selling a Caesar coin/necklace

I was watching the TV show "Caesar's 24/7" on Monday, and on it a high roller purchased a necklace that featured a supposedly 2,000 year old coin with Julius Caesar's likeness on it. The necklace cost $10,000. The coin, from what they showed of it, looked nice and bright, but they didn't give the camera good look at it.
Does anyone have any idea what this coin might have been, and how much would it be worth assuming at least average condition?
Does anyone have any idea what this coin might have been, and how much would it be worth assuming at least average condition?
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WNC Coins, LLC
1987-C Hendersonville Road
Asheville, NC 28803
wnccoins.com
Ebay