Rocksbox is a subscription based try before you buy jewelry service.  

For $21 a month, you'll receive three pieces of jewelry that are yours to try out on loan for as long as you like! When you're ready to refresh your set, please return all unpurchased items at the same time. Just put your set back in the mail using the reusable envelope it came in, with the prepaid USPS return shipping label provided.  

We encourage you to refresh your jewelry as often as you like - you're not limited to one set per month! You can also keep a set for as long as you like - as long as you're paying the Rocksbox Monthly Membership fee. But since fashion is all about change, we recommend keeping things fresh!