Due to the softness of pure / fine silver, it can not be used in its purest form for jewelry. Therefore, to give strength and durability to the pure silver, it is alloyed with other harder metals, usually copper. A mixture of 92.5% of pure silver and 7.5% of copper is known as Sterling Silver. Sterling Silver is one of the most familiar and used form of silver alloys. Purity - 925 points (92.5% pure silver).
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