Goldsmith mixes a small quantity of one metal to pure gold to make it hard. Name the metal.

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Copper
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Goldsmiths and Jewellers add copper (often) or silver (rarely) to gold when making jewellery. Copper is melted together with gold to make an alloy, which can then be beaten, drawn or twisted into various patterns. Gold isn't good for jewellery. Pure gold is a very malleable. Gold for jewellery is...
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Goldsmiths and Jewellers add copper (often) or silver (rarely) to gold when making jewellery. Copper is melted together with gold to make an alloy, which can then be beaten, drawn or twisted into various patterns. Gold isn't good for jewellery. Pure gold is a very malleable. Gold for jewellery is measured in carats. 24 carats refers to the purest (99%) gold. It's used for making gold biscuits and coins. 22 carats (91% gold) and 18 carats (75% gold) are more popular for making jewellery. read less
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Copper
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cupper
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copper because pure gold is malleable hence copper is mixed to make it hard
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Copper or silver
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copper, silver, nickel, palladium and zinc
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