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A green reaction indicates your item is either a base metal or gold plated. A gold reaction indicates your item is gold-plated brass.






A milk-colored reaction would indicate gold-plated sterling silver.






If there is no reaction, you mostly likely are dealing with real gold.
Place your piece of gold in a small stainless steel container.

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Put a drop of nitric acid on your gold and watch for any resulting reaction to the acid.
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