What does 5Nv on jewelry mean?

The "5Nv" marking on jewelry indicates that the piece is made from a specific type of gold alloy, known as 5N gold. This alloy typically contains 18 karats of gold, with the "5N" referring to a gold content of approximately 75%, combined with other metals such as copper to enhance durability and color. The "N" often denotes a reddish or pinkish hue, characteristic of the alloy. This marking is commonly found in high-quality jewelry, especially in pieces from certain manufacturers.