鉴别金子最简单的办法之一是使用磁铁。由于黄金本身是非磁性的,所以如果你用磁铁将金子吸住,那么它就不是纯黄金。这是因为纯黄金是非磁性的,而黄金中掺杂其他金属会导致它的磁性增加。不过需要注意的是,有些不含黄金的金属也是非磁性的,因此这种方法并不是100%可靠的鉴别方法,需要结合其他鉴别手段一起使用。
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