The Mood Ring

Mood rings were first seen in 1970 and they are popular till these recent times.These rings have ability to tell about our mood, although not with precise accuracy. The physics/chemistry involved is thermochromic*  properties of liquid crystal**. Our mood and emotions affect our body temperature and deviates it from the normal temperature (98.4 F). This change in body temperature, affect the liquid crystal of the mood ring.These liquid crystal molecules are very sensitive. They change their position or twist, according to changes in heat radiated by our body which increase or decrease with body temperature (more the body temperature more is the heat radiated). Changes in molecular and lattice structure changes the spectrum of  light which liquid crystal radiate. So, the radiated light tell us about our body temperature and indirectly, our current mood. Most common liquid crystal used is cholesteryl oleyl carbonate (COC) and cholesteryl pelargonate (CP). I have always been fascinate by this ring. Here is how it looks:


Here is list of colour of mood ring and corresponding emotion:

  • Dark blue: Happy, romantic or passionate
  • Blue: Calm or relaxed
  • Blue-green: Somewhat relaxed
  • Green: Normal or average
  • Amber: A little nervous or anxious
  • Gray: Very nervous or anxious
  • Black: Stressed, tense or feeling harried

*thermochromic- substances which changes colour with change in the     temperature of surrounding

**liquid crystals (LC)- are a state of matter that have properties between those of a conventional liquid and those of a solid crystal. For more information on LC go to this link, liquid crystals


One thought on “The Mood Ring

  1. Pingback: The Power of Mood Rings

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