2020-08-24 13:58 You must know that alloys are a mixture of multiple compounds. Sterling silver is an alloy containing a mixture of silver, copper and some other metal added for sturdiness and strength. Sometimes the other metal is also added for a brighter color or improved tarnish resistance. These alloys may also oxidize and turn to a dull, dark black color whenever they are exposed to any chemical present in the air. The most common corrosion or oxidizing causing factors include moisture, sunlight, and other things like sweat or any makeup products. So you will have to be more careful to look gorgeous with this elite kind of metal. wholesale jewelry lots
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