Auctioneer Practice Exam

What is the purity percentage of "sterling" silver?

1. 85.0%

2. 92.5%

3. 99.9%

4. 75.0%

The correct answer is: 92.5%

Sterling silver is defined as an alloy that consists of 92.5% pure silver and 7.5% other metals, typically copper. This specific composition is standard to ensure a balance between the softness of pure silver and the necessary durability for practical use in jewelry and other items. Pure silver, often referred to as fine silver, is 99.9% silver, which makes it too soft for many applications without the addition of a more durable metal. The lower purities listed do not conform to the definition of sterling silver, as they contain even less silver content. Thus, 92.5% is recognized internationally as the hallmark for sterling silver.