Behind the black onyx and shimmering white sapphires is space to place a picture, to capture a memory, while the smoothly polished 18K Gold Plated, Sterling Silver case waits for your words. 18K Gold Plated, Recycled Sterling Silver Locket fits one 10mm photo Free engraving - two lines, up to 6 characters per line Gemstones: 9mm Black Onyx for strength and grounding, Created White Sapphire Locket is 13.2mm diameter Adjustable Chain Length: 18" with 2" extender, lobster clasp