Olympic medals have problems

From the Washington Post:

Now nearly nine months after the Games ended, it looks like organizers in Rio de Janeiro are still experiencing some hiccups. The latest issue has to do with medals handed out to more than 130 winners —  they’re rusting, chipping or as Agence France-Presse put it, “falling to pieces.”...
Andrada didn’t go into exact details about what exactly he thought was happening, but he called it “completely normal.”.. Olympic gold medals, for example, are actually just 1.34 percent gold. The rest is made of sterling silver, ABC News reports. And about 30 percent of the silver in those thousands of medals awarded in Rio came from recycled silver...
“The most common issue is that they were dropped or mishandled and the varnish has come off and they’ve rusted or gone black in the spot where they were damaged,” Andrada told Reuters, adding that silver medalists have seen the most problems.

Also:

The medals for the 2020 Games will be even more unique, with the promise of being the most environmentally friendly of all time. Per The Post’s Cindy Boren, the medals are slated to be composed of recycled cellphones and small appliances donated by Japanese citizens.