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2. Mood ring - Wikipedia

   en.wikipedia.org/wiki/Mood_ring

   A mood ring is a finger ring that contains a thermochromic element, or "mood stone", that changes colors based on the temperature of the finger of the wearer. Finger temperature, as long as the ambient temperature is relatively constant, is significantly determined by peripheral blood flow.

3. Thermochromism - Wikipedia

   en.wikipedia.org/wiki/Thermochromism

   Thermochromism is the property of substances to change color due to a change in temperature. A mood ring is an example of this property used in a consumer product although thermochromism also has more practical uses, such as baby bottles, which change to a different color when cool enough to drink, or kettles which change color when water is at ...

4. Olympic symbols - Wikipedia

   en.wikipedia.org/wiki/Olympic_symbols

   When used in its five-colour version, these colours shall be, from left to right, blue, yellow, black, green, and red. The rings are interlaced from left to right; the blue, black, and red rings are situated at the top, the yellow and green rings at the bottom in accordance with the following graphic reproduction. Designed by: Pierre de Coubertin

5. What Do the Olympic Rings Symbolize?

   www.aol.com/lifestyle/olympic-rings-symbolize...

   The meaning of the Olympic rings Humans have long used rings or circles as symbols, but the the Olympic rings’ meaning is special. For instance, the five rings represent the five continents that ...

6. The symbolism and meaning behind different engagement ring shapes

   www.aol.com/symbolism-meaning-behind-different...

   Here is what the most popular diamond shapes for engagement rings mean. While reading, think about which shape reflects you and your partner. Round Brilliant Cut: Traditional and Elegant

7. Thermochromic ink - Wikipedia

   en.wikipedia.org/wiki/Thermochromic_ink

   Thermochromic ink (also called thermochromatic ink) is a type of dye that changes color in response to a change in temperature. [1] [2] [3] It was first used in the 1970s in novelty toys like mood rings, but has found some practical uses in things such as thermometers, product packaging, and pens. [4]

8. Chromophore - Wikipedia

   en.wikipedia.org/wiki/Chromophore

   Leaves change color in the fall because their chromophores (chlorophyll molecules) break down and stop absorbing red and blue light. [1] A chromophore is a molecule which absorbs light at a particular wavelength and reflects color as a result. Chromophores are commonly referred to as colored molecules for this reason.

9. Meghan Markle shows off two new rings with a special meaning

   www.aol.com/article/lifestyle/2019/10/30/meghan...

   The Duchess of Sussex debuted her new rings while attending a meeting at Windsor Castle, and there's a story behind each of them. Meghan Markle shows off two new rings with a special meaning Skip ...