Mirage Beads. Colour Changing Polymer Mood Beads. 7mm Barrel Spacers. Quantity: 4. Come alive with sensuous colour as your wear these colour-changing mood beads! Inspired by the mood jewellery of the '60's and '70's, these thermo-sensitive liquid crystal beads change colour with minute variations in temperature. Style: Colour changing barrel shaped spacers Measurements: 7mm long, 7mm diameter around the holes. The strand hole are approximately 3mm in diameter. Quantity: 4 beads NOTE: Although very durable, do not submerge in water.