The science and novelty of color-changing mood jewelry

Mood jewelry, specifically mood rings, remains a popular novelty item driven by nostalgia. The Bradford Exchange has released a new sterling silver mood ring featuring a faceted color-changing center stone and simulated diamonds.

While these items are often perceived as indicators of emotional states, experts clarify that the color changes are actually a result of thermochromic technology. According to gemologist Kaitlyn Rigdon, the color shifts are caused by changes in skin or ambient temperature rather than true emotional readings. The mechanism typically involves thermotropic liquid crystals within a glass shell that change molecular structure in response to temperature fluctuations.