Here is a picture of the free pattern for March. It was inspired by a similar one that I found an image of on the pages of a fashion magazine - the necklace in question retails at £300 so this is my budget copy!
It only uses a very small amount of yarn, beads and ribbon so would make an economical gift. I would think that one ball of Rowan Lurex Shimmer may even be long enough for you to make 4 of these and one bag of beads will also go a long way.
Finding plastic rings to crochet around can be tricky, especially the larger sizes, if you are feeling particularly resourceful you could cut up a plastic container lid or use a piece of bent wire.