Talk about a piece that makes a statement: This eye-popping gem doubles as a teeny message machine. A microchip beneath the stone connects to your iPhone via Bluetooth and then, through the Ringly app, you set it to vibrate and light up when notifications hit your device. It can deliver more than calls and texts–it buzzes when your Uber arrives, when you get Instagram Likes, and even when Gilt loads new sales. $195
