This is a vibrational prayer box from Rudrakasha.com.  The wearer places a small written copy of a prayer into the prayer box and clips it to a piece of jewelry.  The intended result:  the prayer's positive vibrations influence the wearer's life.

The Rudrakasha site explains more.   It also has a blog devoted to yoga and the Hindu Lord Ganesha--which, among other things, explains just what an enlightened soul should do when someone brings a "gooey yummy pastry" into the break room!