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Mood Rings contain thermotropic liquid crystals inside the stone or the band of the mood ring. These liquid crystals are able to show different colors at different temperatures. The liquid crystals in modern mood jewelry are usually made from a flat strip of liquid crystals with a protective coating.
Cris Lee, Average person. Views. Mood necklaces or rings usually contain a chemical that changes color with heat (example cold to warmer black, purple, blue, green, reddish). They then usually have a pamphlet saying what the colors mean. Heck, maybe you are happier or in love when you skin is warmer- but some people tend to have cooler or hotter skin temperatures all the time & it's not really indicative of mood.