Back in the 60's and 70's, the Beatles seemed to be the center of everyone's universe and the mood ring was wildly popular. It changed colors when you wore it...like magic! Today there is a modern-day equivalent, the “mirage” bead. Made of thermo-sensitive liquid crystal, it continually changes color based on the temperature around it. For Janice and other old hippies, it's just groovy! With a 1.6mm hole, most of our Greek and Indian leather (up to 1.52mm) will fit. Our 0.8mm Chinese Knotting Cord also fits nicely and if you want to make Setting The Mood, you can handily fit two thicknesses of 0.5mm Chinese Knotting Cord. Enjoy but please do not immerse in water.