So we fell in love with the look of these beads before we even realized they were "mood" beads.  They are a hollow polymer clay that includes a heat sensitive liquid crystal that change color with your "mood". Each one has an intricate pattern. 

Can't be submerged in water.  These are perfect for our magnifying glasses, letter openers, pens, styluses, and mirrors.  They can be used on our other products, just instruct customers to hand wash.