I bought this necklace to go with the matching earrings. I was going to Tulum Mexico for 2 weeks and wanted to only bring down one piece of jewelry , and opals go with ANYTHING! :-) Well I was a bit disappointed when I put on the chain and it fit like an 18 inch instead of what was said"Opal hangs from a 20-inch sterling silver chain. Oh well.. I'll take off the pendent which is very pretty and a nice size and put it on a better sterling chain that fits better. I will go to a craft store and buy pieces to make the chain longer later.