Mood rings first made their appearance in the 1970’s. You wore it on your finger and the color of the stone would reflect the state of your emotions. There were many incarnations of the personal mood-detector. There was a big flat masculine-looking ring, a watch that changed color, pendants and even nail polish.
The way mood rings work is simple. The stone in a mood ring is either a hollow glass shell filled with thermo tropic liquid crystals, or a clear glass stone sitting on top of a thin sheet of liquid crystals. These liquid crystal molecules are very sensitive and they change position according to changes in temperature.
This change in molecular structure affects the wavelengths of light that are absorbed or reflected by the liquid crystals, resulting in an apparent change in the color of the stone.
For example, as the temperature increases, the liquid crystal molecules twist slightly in one direction. This twist causes the liquid crystal substance to absorb more of the red and green portions of the visible light, and reflect the blue part. This causes the stone to appear dark blue.
When the temperature decreases, the molecules begin to twist in the other direction, and reflect a different portion of the spectrum . . . which explains why they were totally useless outdoors in winter when they would just turn gray and stay like that
Below is a list of the various colors and their associated feelings:
Slate blue – Happiness, Love & Joy
Blue – Relaxed, At Ease and Calm
Blue/Green – Somewhat Relaxed
Green – Average reading – Not under stress
Yellow/Green – Troubled & Uneasy
Grey – Anxious/ Nervous
Black – Tense, Nervous, Anxious, Harassed
So…If you are having one of those days when you just don’t know what you’re feeling, slip on a mood ring and it will tell you.