Necklace Details: Personally choose your chain style, material, and length. The gold-filled option consists of a thick layer of 14k solid gold on the outside of a metal core. It is layered with the same gold that you would get from a real 14k piece, which makes it a better choice than any plated gold. Our 10k solid gold is composed of the lowest solid gold alloy used for real jewelry. Because it is more alloy than gold, it stands up well to wear and tear. 10k solid gold would be the higher quality option. Visit ourGold Jewelry Care Blogto learn more about gold.