I've made this out of turquoise and silver aluminium rings, and added a rabbit charm too (tibetan silver), this is £10 inc postage and £1 donation to PaP, if you can let me know the size you want, I'm happy to add / remove links for a perfect fit (this is currently standard 7.5 inches):-
If you would prefer this without the rabbit charm, I'll put transfer it to a mobile charm instead