Five Natural Color-Changing Gemstones

A ring with a purplish-red center stone.
Photo by Sabrinna Ringquist on Unsplash.

If you grew up in the 1970s, you likely remember how popular mood rings were. Mood rings contained thermotropic liquid crystals, typically encased in quartz. The crystals moved in different ways in response to the wearer’s temperature, displaying different colors. Each color represented a mood or feeling.

Though mood rings are no longer popular, you can still enjoy color-changing jewelry. These…