925 means that it is only 99.9% sterling silver of 925. They are genuine and high quality sterling silver, rather than silver plate. The number indicates the metal also indicates 7.5% of copper alloy. It is a customary used by craftsmen.
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what does 925 on sterling silver mean
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The 925 on sterling silver means that it is sterling silver. Sterling silver is 9.25 pure and that is where the number comes from. Pure silver is too soft to use to make anything and that is why it must be mixed with something else.
The stamp 925 on sterling silver, means that it is the purest silver you can get for jewelry. The item contains 92.5% silver and the remaining 7.5% is a metal that is added to make the silver strong.