In the days of the gold standard, it was prohibited to alter US coins in any way due to their being deemed property of the government. After the separation from the gold standard in 1972 this prohibition dissolved. Many old-timers occasionally ask us, "Wouldn't the government be upset?" 

The answer is "Absolutely not!" In fact, Aurista coin jewelry and watches are a favorite of shoppers at the gift shops located at US Mint facility tours. 
As long as one does not alter a coin with intent to mislead, one is 100% within the law.

US Code 18-331, the law, only prohibits misrepresentation. 

At Aurista, we provide only authentic items of lasting value. Every coin or medallion comes with its own certificate of authenticity.