by 3 hours ago
ANSWERS: 2
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There are commerical cleaner's both creams and soaks to clean up gold chains but a very easy and cheap way is to use tooth paste.
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If your chain has developed a greenish build up, it is just possible that your "gold" chain might be manufactured from brass and the greenish build up is a deposit of copper compound(s). Chemically, gold is one of the most inert elements, being unaffected by the common mineral acids but capable of reaction with aqua regia, a mixture of nitric and hydrochloric acids. This fact is made use of by jewellers to perform a quick and easy test for fake gold items, which are usually made from brass. A drop of hydrochloric acid placed on brass will effervesce and produce a greenish solution, whereas when placed on gold there is no chemical reaction.
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