What kind of jewelry is stamped 315?

Jewelry stamped with "315" typically indicates that it is made of 315 parts per 1000 of pure silver, which translates to 31.5% silver content. This is not a standard marking for precious metals, as sterling silver is usually marked with "925," indicating 92.5% silver. Therefore, a "315" stamp suggests a lower quality silver alloy or a different metal altogether. Always verify with a professional if you're unsure about the authenticity or quality of the piece.