Serotonin is popularly known as the "happiness" molecule. It is a neurotransmitter, popularly thought to be a contributor to feelings of well-being and happiness. Serotonin has the molecular formula of C10H12N2O.

This necklace is laser cut from one piece of 3mm acrylic and measures about 4.7cm wide x 3.2cm tall. The molecule pendant is attached to a 18" silver plated necklace chain. It comes in a CrankyBot gift bag.