This is a vintage 1970s Mood Ring. This ring has a Mood Stone in a gold-tone setting.
The inside of the ring has PAT. The ring changes color in response to the body temperature of its wearer. It was patented in 1974 by Bill G. According to the patent, it is called a heat sensitive novelty device which utilizes the iridescent qualities of liquid crystalline material to effect variations in colorations of the device upon application of different reference-cited temperatures. The original literature stated the following (not included): COLOR YOUR MOOD stone allows you to see yourself in a new colorful way.You own energy will cause the stone to change color to reveal your inner emotions. Relax, give the stone time to warm up your inner emotions. BLACK: tense, nervous, harassed, overworked GRAY: anxious, nervous, strained AMBER: nervous emotions, mixed emotions, unsettled GREEN: active Not Under Great Stress BLUE-GREENInner Emotions Charged, Somewhat Relaxed BLUE Relaxed at Ease, Calm, Loveable DK. BLUE Very Happy Love Passion Romance. Area of mood glass is discolored as seen in last photo. Kept in an immaculate pet-free and smoke-free home. The item "Rare Original 1974 Mood Ring Patent 3,802,945 Size 7" is in sale since Monday, April 20, 2020. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Retro, Vintage 1930s-1980s\Rings". The seller is "amkucirk-0" and is located in Lebanon, Pennsylvania. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Costa rica, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Turks and caicos islands, Bangladesh, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Luxembourg, Monaco, Macao, Martinique, Nicaragua, Peru, Pakistan, Paraguay, Viet nam, Uruguay, Russian federation, South africa, Colombia, Antigua and barbuda, Saint lucia, Barbados, Bermuda, Cayman islands, Sri lanka, Maldives, Oman, Reunion.