Why is gold always mixed with copper or silver in jewelry? Detailed answer

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Why is gold always mixed with copper or silver in jewelry? Detailed answer

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Why is gold always alloyed with copper or silver in jewelry?

Pure gold without impurities is so soft that it can be scratched with a fingernail. Therefore, in jewelry, gold is always alloyed with copper or silver.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Who invented the most important astronomical instruments?

The astrolabe, a device for determining the height of light above the horizon, was invented by the Greek Hipparchus (c. 180 or 190-125 BC) in 150 BC. e.

The first spyglass was built by the Dutchman Hans Lipperschey (XVII century) in 1608. True, it was used for astronomical observations by Galileo Galilei (1564-1642) in Italy.

The first mirror telescope was built by the great English physicist Isaac Newton (1642-1727) in 1668. Until the advent of the radio telescope, these instruments were the main ones in astronomy.

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