Is all Sheridan silver silver plated?

Not all Sheridan silver is silver-plated; it is a brand known for both silver-plated and sterling silver items. Sheridan silver-plated pieces are typically made of a base metal coated with a thin layer of silver, while sterling silver items contain 92.5% pure silver. To determine if a specific piece is silver-plated or sterling, check for markings or stamps that indicate its composition.