What is MDD stamp on jewelry means?

The MDD stamp on jewelry typically indicates that the piece is made from a specific type of metal, often referring to "Metal Detected and Defined." It signifies that the jewelry has been tested for authenticity and quality, ensuring that it meets certain standards. This stamp can be a mark of assurance for buyers regarding the metal's composition and purity. Always check with the manufacturer or jeweler for specific meanings associated with the stamp, as interpretations can vary.