The mood stone was supposedly invented by Joshua Reynolds and Maris Ambats in 1975, however, Marvin Wernick, claimed he developed the rings a decade earlier. The book ‘Why Didn’t I Think of That’ is said to contain a chapter explaining Wernick’s work with mood stones, which he did not patent, giving others an opportunity to bring mood rings and such into the market.
Regardless of who invented the mood stones, they were a popular fad in the 1970s and now mood jewellery is becoming as popular as ever. The stone rings change colour ‘supposedly’ according to the mood or emotional state to the wearer, so how do they work? The stone is really just a hollow quartz or glass shell containing a thermotropic liquid crystals. The crystals respond to changes in temperature by twisting, the twisting changes their molecular structure which alters the wavelength of light that are absorbed or reflected or in other words it changes colour due to the temperature of the person wearing the ring. So what a surprise mood rings can’t tell us our moods, in fact mood rings can’t even tell your emotional state with any degree of accuracy.
The mood ring changes colour with body temperature which is supposedly reflects an emotional state. One major issue with mood rings is that it doesn’t account for other variables, for example if you was to be in a relaxed mood but it was extremely cold outside your body temperature would be lower which means the temperature of your body is not correspondent with the mood you are in. Here is a list that indicates what your mood ring is supposed to signify. Violet blue – happy, romantic, blue – calm, relaxed, green – average, not much going on with you, yellow/amber – tense, excited, brown/grey – nervous, anxious, black – cold temperature or damaged ring. So even with mood rings, it’s no magic! Just Chemistry!