Gold Write for Us
The golden metallic hue of gold makes it an instantly recognisable chemical element. Its rarity, anti-corrosion properties, electrical conductivity, malleability, ductility, and beauty make it precious. Most people will respond that you get gold from a mine, pan for flakes in a stream, or extract it from saltwater if you ask them where it originates. The natural source of the element, however, was before the Earth was formed.
How Much Gold Is in the World?
A tiny portion of the Earth’s entire mass is made of gold that has been mined from it. Since the beginning of civilization, the United States Geological Survey (USGS) calculated that 5,726,000,000 troy ounces, or 196,320 U.S. tonnes, had been created. Approximately 85% of this gold is still in use. Due to its high density (19.32 grammes per cubic centimetre), gold does not require a lot of room to contain its mass. If all the gold mined up to this point were melted together, the result would be a cube roughly 60 feet big!
But just a tiny fraction of the Earth’s crust, or a few parts per billion, is gold. The full kilometre of the Earth’s surface contains around 1 million tonnes of gold, yet removing much of it is not economically practical. The abundance of gold in the mantle and core is unknown. But likely far more than the amount in the crust.
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