14K solid gold. For some reason the photos are making it look like there’s a big gap in the clasp, but there’s not. If needed, I can provide more photos on the bracelet on to show it won’t fall off or anything. From the website: Chain width: 2.25 mm. A minimal chain with maximum styling impact. Handcrafted in 14k solid gold, this chain is named for the way its interconnected links resemble a ship’s chain holding an anchor. When properly cared for, our 14k gold pieces can last forever. With its beautiful, subtle hue, you can wear your jewelry every day, everywhere.