The stone itself is made up of thermotropic liquid crystals which move and bend in response to changes in temperature when these crystals move the color.
Mood ring how it works.
These liquid crystals are able to show different colors at different temperatures.
How mood rings work.
The theory behind the mood ring is that your emotional state will be revealed by the corresponding colors of the mood ring.
They change position or twist according to changes in temperature.
The stone of the ring changes color supposedly according to the mood or emotional state of the wearer.
The mood ring was created in 1975 by two new york inventors josh reynolds and maris ambats who bonded.
Mood rings contain thermotropic liquid crystals inside the stone or the band of the mood ring.
Mood rings enjoyed fad popularity in the 1970s and are still around today.
Most mood rings work in the same way.
The stone in a mood ring is either a hollow glass shell filled with thermotropic liquid crystals or a clear glass stone sitting on top of a thin sheet of liquid crystals see how lcds work for lots of details on liquid crystals.