Material: Solid. Finish: High Polish, Hypoallergenic, Tarnish Resistant, Nickel Free. Our chemistry necklace promotes happiness and well-being- We turned serotonins chemical structure into a modern and intriguing piece of novelty jewelry. Serotonin is a neurotransmitter that contributes to our well-being and happiness. It helps regulate our mood, appetite, and sleep patterns. We offer you the choice of rose gold, gold, carbon black, or silver tone. . Serotonin Necklace . Feel great when you wear or gift this happy necklace. Our serotonin necklace offers a way to remind yourself to be happy. Consider it a pick-me-up as you go through your day-to-day activities. Its solid color even makes it easy to wear with anything. Wear it yourself or gift it to a friend to let them know youre happy that theyre part of your life. Its also a fitting college or high school graduation jewelry gift for aspiring scientists or chemists. Perfect as science jewelry for college pr . BGTYs serotonin chemical structure necklace is perfect for chemistry lovers- Do find yourself saying, I love chemistry? Then, this science necklace is for you Proudly wear serotonins molecular structure and actually understand the science behind it. This science jewelry will give you opportunities to educate your friends and family. Wear this geek statement necklace and flaunt your science-loving, quirky side. Gift this serotonin molecule jewelry piece to someone in your life today. Its ideal for aspiring or current chemists, science-lovers, or nerds in general. This science jewelry is also a great way to spread happiness and to let your friends know youre glad to have them in your life.