What does a star 313 vi on gold necklace mean?

The "star 313 VI" on a gold necklace likely refers to a specific design or maker's mark. The "star" could indicate a brand or designer, while "313" might represent a model number or collection. The "VI" could denote the sixth version or variation of that particular design. To get a precise meaning, it would be best to consult a jeweler or the brand associated with the necklace.