What does 10v mean on a necklace?

The "10v" on a necklace typically indicates the necklace is made of 10% gold (10 karats) and the remaining 90% is made of other metals. This marking signifies the purity of the gold used in the piece. In some contexts, "v" might refer to a specific brand or designer, but it’s most commonly associated with the gold content. Always consider verifying with a jeweler for specific meanings in context.