Dainty Mermaid shell necklace Gorgeous dainty shell necklace for all the mermaids. The pendant comes on a brass chain of 18 inches. Please note that every single piece of these shells are hand made when it comes to the setting. Due to the nature of the process there might be differences in the way the gold covers the shell. This process makes each piece unique and one of a kind. The piece that you’ll receive might have a slightly different gold pattern on it, although we try our best to make them as similar as possible.