They are worth about $587 in current market prices.
Victor Hugo Berbert, head of medal-making at Brazil's National Mint in Rio de Janeiro,said
It's a great honor and a great responsibility,' Each of the 5,130 Olympic and Paralympic medals took about 48 hours to make
Much of the silver is recycled from old mirrors and X-ray plates. The gold is free of mercury, which is often used to separate gold from ore and can poison local ecosystems if not carefully disposed of.
The last time athletes earned medals made of pure gold was at the 1912 Olympics in Stockholm, Sweden.