Mirage Beads. Colour Changing Polymer Mood Beads. Mermaid's Tale Design. 16.5mm Round Spacer Beads. 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, round spacer beads with a mermaid design. Measurements: 16.5mm thick. 18.5mm in diameter around the hole. The strand holes are approximately 2.8mm in diameter. Quantity: 2 beads NOTE: Although very durable, do not submerge in water.