Gold mainly exists as gold minerals , including electrum, silver - bearing native gold.

金以矿物态为主,金矿物主要为银金矿 、 含银 自然金.

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Most natural electrum also contains copper, iron, palladium, bismuth, and perhaps other metals.

大部分天然银金矿含有铜 、 铁 、 钯 、 铋, 可能还有其它金属.

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