Et in Arcadia Ego
From the Heilbrunn Timeline of Art History at the Metropolitan Museum of Art, here's a 16th century memento mori rosary carved out of ivory featuring man on one side and skeleton on the other
Mourning Ring: gold; round the outside of the hoop a skeleton with arrow between legs, crown, cross-bones, hour-glass, pair of wings, star, spade and pick crossed; panel with inscription over sword and two crossed spears; inscribed. D-section. Image © The Trustees of the British Museum. (If you repin this without proper citation, you are probably in violation of British law.)
A rare early 18th century Memento Mori band gold known as a skeletal, as the whole length of the skeleton is employed on the outside of the hoop, with other emblems. The earliest known example is dated 1659. This ring is enamelled in black with a full skeleton, twin hearts for love and an hourglass, symbolic of the passage of time and the brevity of life.
Katsuyo Aoki, Predictive Dream XVIII