What does 825FAS engraved in a ring band mean It reads 825 FAS?

The engraving "825 FAS" on a ring band indicates that the metal is 82.5% pure silver, which corresponds to sterling silver, often denoted as 925. The "FAS" could refer to the manufacturer's mark or a specific brand associated with the piece. It's common for jewelry to have such markings to denote quality and authenticity. Always verify with a jeweler for specific details about the piece.