There is something very cool about puzzle rings and this one Star of David puzzle ring is super cool. The ring is by Israeli jewelry Etsy seller Dafna Dagan and is silver. The ring is actually 4 rings that come together to make the Star of David symbol.
You can buy the ring on Etsy here: Dafna Dagan Star of David Puzzle Ring
To see other things Dafna Dagan has on sale you can visit her Etsy shop here: http://www.etsy.com/shop/dafnadagan