As a non-reactive, non-toxic metal, gold is highly resistant to heat and has many uses. Because gold is such a soft metal, it can be easily stretched into thin coatings, making it a perfect choice for electronics. As the world’s electronics demand grows every year, gold is increasingly becoming more common in consumer products. In fact, electronics used over 1,400 tonnes of gold in 2017 alone, accounting for 34% of all the gold used in the US.
The history of gold mining dates back to ancient times. The Old Testament mentions gold in Genesis 2:11 and in many temple parts. In the New Testament, gold is associated with Christ, as in the children’s fable’s Jack and the Beanstalk. Moreover, gold is an important prize in the Olympics, and it was used in the world’s earliest coinage in Lydia. And the metal is found in the sea to a small degree, ranging from 0.1% to two milligrams per cubic ton.
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In the United States, gold purity is measured in karats. One carat equals 200 mg. In comparison, a half-carat is equivalent to about 33% gold. The higher the karat number, the more pure the gold. As gold is so rare, karat numbers are very valuable. But how do you know whether your piece is really gold? By knowing its purity, you can safely purchase it. The next time you’re shopping for a gold necklace, make sure it’s stamped with the karat number.