A signet is a type of seal used to give personal authority to a document in lieu of a signature. It can also refer to a small intaglio seal, such as one found in a finger ring. Signet rings are a classic piece of jewelry that have seen a resurgence in modern times. They are characterized by a raised, flat surface that normally houses an engraving, such as a unique family crest. Signet rings were originally used to mark and seal documents by pressing the face of the ring into hot wax. The impression made by a signet can also be referred to as a signet.