Olympics 2016: Everything You Need to Know About Gold Medals

First off, there’s not a great deal of gold in them.

— -- Winners biting down on their gold medals has become the classic post-competition pose at the 2016 Summer Olympics in Rio.

Today, Olympic gold medals contain only about 1.34 percent gold, with the rest composed of sterling silver.

According to Forbes magazine contributor Anthony DeMarco, the medals themselves are “the most sustainable ever made.”

DeMarco told ABC News that the silver is "30 percent recycled, using mirrors, X-ray plates and other kinds of refuse." At the current market prices for gold and silver, the price of the medal is about $564.

U.S. athletes earn $25,000 for winning gold. It’s taxed by the government as income earned abroad.

Beyond the so-called podium value, some medals wind up being worth far more. One of the four track and field gold medals Jesse Owens won at the 1936 Summer Games in Berlin was sold at auction for $1.47 million in 2013.

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