Mood ring
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A mood ring is a finger ring that contains a thermochromic element that changes colors based on the temperature of the finger of the wearer. A mood stone is a thermochromic element in an accessory. Fi
The original "mood ring" introduced as the Mood Stone in 1975.
Thermochromism
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Thermochromism is the property of substances to change color due to a change in temperature. A mood ring is an example of this property used in a consumer product, although thermochromism also has mor
Mood ring
…A mood ring is a finger ring that contains a thermochromic element that changes colors based on the temperature of the finger of the wearer. A mood stone is a thermochromic element in an accessory. Finger…
Example of a thermochromic T-shirt. A hairdryer was used to change the blue to turquoise.
Another example of a thermochromic T-shirt.