Pennsylvania Auctioneer Practice Exam

How pure is "sterling" silver?

1. 50%

2. 75%

3. 85%

4. 92.5%

The correct answer is: 92.5%

Sterling silver is typically made up of 92.5% pure silver and 7.5% other metals, such as copper. This high percentage of pure silver gives it its characteristic shine and luster. The other options provided are incorrect because they represent much lower percentages of purity, which would result in a significantly lower quality and value of silver. Option A, with 50% purity, would likely result in a dull, grey appearance that is common in lower quality silver. Option B, with 75% purity, may have a slightly better appearance, but would still lack the high shine and luster of sterling silver. Option C, with 85% purity, is closer to the correct answer, but would still result in a lower quality silver that may not be considered "sterling." Therefore, option D with 92.5% purity is the best and most accurate description of the purity of sterling silver.