Mood ring Source: en.wikipedia.org/wiki/Mood_ring

The original "mood ring" introduced as the Mood Stone in the summer of 1975

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. A mood ring contains liquid crystals which change color depending on the temperature.[1]

See also[edit]


  1. ^ Marechal, Catherine; et al. (2019). "Survey on AI-Based Multimodal Methods for Emotion Detection". In Kołodziej, Joanna; González-Vélez, Horacio (eds.). High-Performance Modelling and Simulation for Big Data Applications. p. 308. ISBN 978-3-030-16272-6.