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There are acid tests, and jewlers have a few techniques using hardness and such, but the easiest way for a lay-person to identify gold is by density (or sometimes called specific gravity)

You do this by measuring the mass (weight) and volume of the item.

density = weight / volume

You can measure the volume by difference using a graduated cylinder and water.

You can measure the mass with a precise enough scale.

You can find the expected density of a given karat value by searching your favorite search engine for "density karat gold" and be careful that your units match the numbers given.

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16y ago

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