(see all 24 photos provided)... likely gold-filled or gold plated (I don't see any markings). Take hold of the charm loop and slide it down to expose the glass covered photo locket (not meant to be easy but remove glass insert, remove the blue fabric & insert your own photo or lock of hair, etc.).  Fits nice and tight. Beautiful gold tones, pink cameo on purple glass, microscopic Lord's Prayer on a 16mm x 10mm "tablet" surface.  This one has a lot of unusual neat features. It's a beautiful vintage locket! ...measures about 22mm x 17.5 ... Please include $3.95 domestic shipping... (Worldwide International shipping please include $16.95 s/h). Thanks for stopping in...

"For God so loved the world that He gave his one and only Son, that whoever believes in him, shall not perish but have eternal life"          Jesus (John chapter three)