New Application for Mood Ring Technology

mood-ringThe mood ring, a popular fad in the late 1970s, is a specialized liquid crystal thermometer typically ornamented with a faux gemstone (usually made of quartz or glass). Temperature changes in the wearer’s finger cause the crystal to reflect different wavelengths of light, which change the color of the stone.  Green is considered normal or average, while blue is calm and relaxed and black is stressed and tense. Continue Reading…