Carnelian Madonna Cameo Locket; Cameo Size: 40 mm * 30 mm;Necklace: 32″ 80 cm ; Material Brass A locket is a pendant that opens to reveal a space used for storing a photograph or other small item such as a curl of hair. Lockets are usually given to loved ones on holidays such as Valentine’s Day and occasions such as Christenings, weddings and, most noticeably during the Victorian Age.