A mood ring shown from the front. Note the band of color change.

A mood ring shown from the side.

A mood ring is a ring which changes colour in response to body temperature, using a thermochromic liquid crystal. The mood ring is a form of biofeedback and supposedly indicates the temperament of the wearer, indicated by their temperature. Mood rings were a fad whose popularity peaked in the United States in the 1970s, and they are now seen as an icon of 1970s culture. Mýa Marie Harrison (born October 10, 1978),[1] known professionally as Mýa or Mýa Harrison, is an American R&B and pop singer, songwriter, record producer, dancer, actress, and model who rose to fame during the late 1990s. ... Moodring is the third album by American R&B and pop singer Mýa, released in the United States on July 22, 2003 (see 2003 in music) via Interscope Records. ... Image File history File linksMetadata No higher resolution available. ... Image File history File linksMetadata No higher resolution available. ... Image File history File linksMetadata No higher resolution available. ... Image File history File linksMetadata No higher resolution available. ... A finger ring is a metal band worn as an ornament around a finger; it is the most common current meaning of the word ring. ... Color is an important part of the visual arts. ... Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when temperature surrounding is very different. ... Thermochromism is the ability of a substance to change colour due to a change in temperature. ... Schlieren texture of Liquid Crystal nematic phase Liquid crystals are substances that exhibit a phase of matter that has properties between those of a conventional liquid, and those of a solid crystal. ... Biofeedback mechanism. ... For other uses, see FAD (disambiguation). ... The 1970s decade refers to the years from 1970 to 1979, also called The Seventies. ...

There are many different types of mood rings, and it generally depends on the manufacturer which mood the colors represent. The ring has however, also appeared as other forms of jewellery including in necklaces, earrings, and toerings. For the Korean music group, see Jewelry (group). ... For other senses of this word, see necklace (disambiguation). ... An earring is a piece of jewelry that is worn on the ear. ... This article needs to be cleaned up to conform to a higher standard of quality. ...

Workings of a mood ring

The stone in a mood ring is, essentially, thermotropic crystals covered or surrounded by glass. These crystals are very sensitive, and of the ring, and "twists" the crystals inside. The crystals then reflect different wavelengths of light, thereby changing the color of the ring. A liquid crystal ( LC ) is thermotropic if the order of its components is determined or changed with temperature. ...

Due to fluctuations in the making of mood rings by various companies, interpretation of mood ring colors are not universal. However, a certain standard is fairly prevalent, and is the only one commonly found in any form of documentation. This standard is based on the crystals being calibrated to have the color green reflected at 82 degrees Fahrenheit (27.7 degrees Celsius), which is the typical surface temperature of people. Variations of the actual surface temperatures among different people, as well as effects from outside temperatures, cause mood ring measurements to differ, and make their readouts rather unreliable. For other uses, see Green (disambiguation). ...

External links

Mood ring chemistry