An unique black onyx clad sterling silver heart locket necklace: 1. a solid sterling silver heart shaped locket (20 x 20mm, 8.8 mm thick, 4.7 grams) that can hold two pictures inside . Its front is covered with a black onyx of a matching shape with a silver bezel. Its back is plain and can be custom engraved (please use pulldown menu to select) with monograms, initials, short text, handwriting, fingerprint or simple graphics. 2. Photo insertion service available at $14 each…