Medallion pendant, silver, silver gilt, of circular form, with a corded fram and suspension ring above. One side is engraved with the Mystical Marriage of St. Catherine of Alexandria who kneels to the left dressed in a coif and long robe, holding a sword in her left hand and with her wheel at her feet. Right, the Virgin sits on a crescent moon on an almond-shaped mandorla. A column in the background supports a vaulted ceiling.
The other side is engraved with the Mass of St. Gregory. Through an arched window is a representation of the Instruments of the Passion. Behind the Pope a kneeling cleric and page hold candles.