I just purchased some necklace chains, E6000 glue and some other necessities for this DIY on Ebay. It's cheap and you will even be able to find sterling silver necklaces for a good price.
I hope you liked this little DIY! I already made some other ones right now and I'm planning on giving one to my mother for her birthday soon because it just looks nice! Which design did you like the most? Let me know in the comments!