Mourning Jewelry is jewelry worn after the loss of a loved one. At one point it was given out by wealthier families after a death.
Mourning Jewelry is typically made of jet, ebony, onyx, or bog oak. In many instances hair is woven into it, or there is a compartment to hold a lock of hair or photo. Sometimes these are hidden compartments. Above you see a lovely piece of mourning jewelry. What a lovely custom! I am surprised it fell out of fashion.