Mirage Beads. Colour Changing Polymer Mood Beads. Fountain Fern Design. 23.5mm Diameter Round Spacers. Quantity: 2. 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: Large disc-shaped spacer beads with an elegant fern design. Measurements: 23.5mm diameter. 7mm thick. The strand holes are 2.5mm in diameter. Quantity: 2 beads NOTE: Although very durable, do not submerge in water.