This Knock Knock Locket ($42) by Lanyapi has all sorts of etched detailing around the edges and a beautiful raised door knocker on the front. The knocker lifts to allow functional knocking. We love it. The chain is 14k gold filled with some pearl beads attached, but we think it would look nice on a silver snake or box chain. We at Bling of the Day have chain issues... that aside, this necklace was featured in an Etsy Gift Guide and as a bonus, you get free shipping worldwide! This necklace is a must-have.