The most precious metal
Gold is a rare metal with a lovely glowing colour. It is
easy to shape, and it is not affected by air or by water. Because gold is so
soft, it can be beaten into very thin
sheets and it can also be drawn out into very fine wire. Gold is therefore an
excellent material for making beautiful objects, such as bowls, necklaces and
rings. Over 5,000 years ago, the ancient
Egyptians prized gold so much that they believed that all gold belonged to
their kings, the Pharaohs. In fact, luckily for us, they buried many precious
gold objects in their Pharaohs’ tombs, and we can see many of them in museums
today. The Egyptians were so skilful that they could beat gold into sheets so
thin that a pile of 35,700 would be only 2.5cm high. Such sheets are called
gold leaf.
Gold leaf is still used today to
decorate, for example objects made of
wood or leather. The gold used to make jewellery is usually mixed with other
metals. This not only makes the articles cheaper, but also harder. The purity
of gold is measured in carats (also spelled karats). A carat is one twenty-
fourth part by mass. So pure gold is 24 carat. 21-carat gold would be half gold
and half of some other metal. Because
it was scarce and therefore valuable, gold was formerly used as money all over
the world. Nowadays, we use pieces of paper instead, but many countries still
keep bars of gold in their banks. They can change this gold into money by
selling it to other countries. About two thirds of all the gold in the world is
kept in this way. Gold is found in many
parts of the world, usually buried deep underground. It can also be found in
rivers. The sea too contains gold, but it would cost far more money to extract
the gold from the sea than the gold is worth.
In modern times, many practical uses for gold have been found, for
example, in electrical switches, in dentistry, and for thinly coating the
windscreens of aircraft and spacecraft to prevent the glare of the sun.
Vocabulary note
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- What’s the strangest piece of information you‘ve read
about gold?
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