Memento Mori which literally means, "remember you must die", in Latin is jewellery term that is used to describe items using motifs that invoke remembrances of death, in general, or the reminder of a death of a loved one.
Memento Mori whihc is also known as Mourning Jewelry or is jewelry made to honor the dead. Popular designs show a skull or skeleton, black stones, or black enamel. Hair could form a design or be mixed in with paint to create a picture.