Visual markers of marital status

The concept of mourning jewelry, which is colored black, is becoming an accepted, visible custom for widows and widowers. Usually a black wedding band is worn on the third finger of the left hand. Usually the ring is a black wedding band, but black eternity bands and black solitaires are also worn. Such jewelry is denominated a ``widow's ring'' and the mourning ring is added to the marriage ring(s) and worn for the duration of the mourning period.

Question: is there such a thing as a widow's ring
Answer: yes