Silver Clamshell Photo Locket Necklace Silver Clamshell Photo Locket Necklace. This stunning silver clamshell photo locket necklace is made with stainless steel. The chain is 0.6mm round cable chain in 304 stainless steel. It's the perfect gift idea for the women in your life. You can check out more information, including lots of picture's of this Clamshell photo locket here. Gift wrapping is available free of charge. If you would like your items gift wrapped, please include a note to seller at check out. See all our Stainless Steel Photo Locket Necklaces.