This puff heart pendant resembles a lock so you can you can keep your love secure. With a diamond-cut center, it has extra sparkle. Crafted from 14K gold that's gone through a patented hardening process, this necklace is more durable and resistant to denting, scratching and breaking. It will also maintain their consistency in color, shine and vibrancy for many years. Hypoallergenic and nickel free. Metal: 14K yellow gold Closure: Spring-ring Length: 18 rope chain Pendant Size: 26.13x17.8mm Thickness: 3.55mm Jewelry photos are enlarged to show detail.