When you're looking at silver pieces, understanding the difference between coin silver and sterling silver is absolutely crucial, as it directly impacts the item's quality and value. Don't be misled into thinking they are the same; the distinction lies in the purity of the silver itself.
The most important difference is the required silver content. Sterling silver is the higher standard, mandated to be 92.5% pure silver. This is why you often see items stamped with "925," which represents its millesimal fineness, or 925 parts per thousand of pure silver. The remaining 7.5% is an alloy, typically copper, which is added to give the soft precious metal the necessary strength and durability for items like jewelry and fine tableware. Because of its higher silver content, sterling silver is inherently more valuable.
Coin silver, on the other hand, has a lower purity requirement. As its name suggests, this was the standard for silver currency in the United States. To be classified as coin silver, an item must contain at least 90% pure silver, also known as ".900 fine." The other 10% is made up of alloys like copper and nickel. While still valuable, this slightly lower percentage of pure silver means it does not meet the more rigorous standard of sterling.
Ultimately, that small 2.5% difference in purity is what separates the two. Whether you are buying or selling antiques, knowing that sterling silver represents a purer, and therefore more valuable, composition is key to making an informed decision.
