请以5个英文句子，描述黄金的用途，每个句子包含不少于5个单词，尽量使用具体的词语，开头始终用第三人称复数形式。
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They are widely used in jewelry making, valued for their beauty and durability.  
They serve as a hedge against inflation, making them a safe haven for investors.  
They are essential in electronics, used in circuits and connectors due to their conductivity.  
They play a key role in dentistry, often used for fillings and crowns due to their biocompatibility.  
They have historical significance, symbolizing wealth and power throughout various cultures.
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