In one hand, he held up a one ounce US Eagle gold coin, worth over a thousand dollars. In the other: an identical looking Chinese knockoff, worth maybe a dollar.

"Some off them are getting pretty good," Karoleff said. "They will fool the average person, and, worse, even some professionals have been fooled." Can't Spot the Difference

Many collectors --who order these coins online, or buy them on eBay or at flea markets -- are unable to tell the difference.

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http://www.wcpo.com/money/consumer/dont-waste-your-money/counterfeit-gold-and-silver-coins-burning-buyers