My daughter searched the internet for a Time-turner locket "just like Hermione's". She purchased this one through Amazon at what I'm sure is an inflated price, but I have to say, it really looks good.  And she is sooo, soo happy with it.  She wore it to school with lots of complements.  I haven't really closely inspected it, but it looks like some of it (or all?) is good-quality imitation metal (i.e., plastic).  I was worried that it wouldn't turn, but it does. She turns it all the time. We've had it for more than a week and it hasn't broken yet. Hope this is helpful.