What does 858 mean on silver?

The number "858" on silver typically indicates the purity of the metal, specifically denoting that the item is composed of 85.8% silver. This is also known as "858 silver," which is a less common standard compared to the more widely recognized sterling silver, which is 92.5% silver. The remaining percentage often consists of other metals, such as copper, to enhance the durability of the silver item. Always check for additional markings or context to confirm authenticity and quality.