"Wert mark" refers to a stamp or embossed mark that indicates the value or quality of a product, typically used in Germany and other European countries. Synonyms for this term include "value mark," "quality mark," "assay mark," and "hallmark." In the United States and other English-speaking countries, the term "hallmark" is often used to describe this type of mark, particularly in reference to precious metals and jewelry. Other related terms include "carat mark" (used to indicate the purity of gold), "fineness mark" (used to indicate the purity of silver), and "maker's mark" (used to indicate the manufacturer or designer of a product).