14k gold is usually good enough.

来源: ZoyaWashington 2013-12-05 10:56:24 [] [旧帖] [给我悄悄话] 本文已被阅读: 0 次 (256 bytes)
Other metals may cause allergy. If you have sensitive skin, try 18K or 22k.

Beware, your ear studs won't look as good if you don't clean them. And sea water is very corrosive and causes color determinations even for 14k gold. 
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