Gold is extremely malleable and pliable. A one-ounce piece of gold can be beaten down to 5 micrometers thick – that is 1/10 the diameter of a human hair – and laid out into 50 miles of wire. It can also be made so thin that it becomes a translucent sheet; in fact, astronaut’s visors are covered in a thin gold film to protect their eyes from glare. Gold also has anti-inflammatory and other medicinal properties.
Ancient Sumerians of Mesopotamia (modern-day Iran and Iraq) were the first, at around 5000 BC (some sources indicate 4000 BC), to use gold for ornaments. The Egyptians would soon fall in love with the precious metal too. But gold was mostly used for personal adornment; the first gold coins for trade were issued by Egyptian pharaohs only at around 2700 BC. Large scale gold coinage for the monetary purpose was introduced in by King Croesus during his reign (560 – 546 BC) of Lydia (modern-day western Turkey). Croesus became one of the wealthiest persons ever.
How to make your own gold
In the 5th century BC, Empedocles theorized that everything is made from earth, air, water and fire. His four-element theory led alchemists to belief that it should be possible to break down lead and reassemble it as gold. By the 17th century, they believed that if gold itself could be broken down, it could be sown like seeds. It was not to be.
But gold can be manufactured. By firing neutrons into a nucleus to change an atom, gold can be produced from cheap metals. However, the nuclear process costs far more than mining gold. Furthermore, the gold would end up radioactively.
No comments:
Post a Comment