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Mood ring
A ring that contains a thermochromic element / From Wikipedia, the free encyclopedia
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For other uses, see Mood ring (disambiguation).
A mood ring is a finger ring that contains a thermochromic element, or "mood stone", that changes colors based on the temperature of the finger of the wearer. Finger temperature, as long as the ambient temperature is relatively constant, is significantly determined by peripheral blood flow, which is modulated by the autonomic nervous system.[citation needed] A mood ring contains liquid crystals that change color depending on the temperature.[1]
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