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.

These drop earrings are made from a wooden outer layer, with a laser cut inlay featuring the serotonin molecule The earring is approximately 12mm across. The earrings come on silver plated hook earrings. Due to the handmade nature of this piece, very slight variations may occur from the item pictured. All artwork is originally designed and crafted in CrankyBot's home studio in Canberra, Australia.