What does VO stamped on jewelry mean?

The "VO" stamp on jewelry typically indicates that the piece is made of vermeil, which is a type of gold plating over sterling silver. Vermeil must meet specific standards, including a minimum thickness of gold plating, to ensure quality. If you see "VO" on a piece, it suggests that the jewelry is both valuable and durable, combining the look of gold with the affordability of silver. Always check for additional markings to confirm the authenticity and quality of the piece.