This is an excavated Baroque agate intaglio, dating to the 17th century. It is cut with a portrait of a bearded philosopher, (perhaps Socrates?) Such a gem may have been set into a gold signet ring, used to seal and authenticate letters between learned friends.
DATE: c. 17th century
SIZE: 21.58mm x 19.10mm x 5.14mm
WEIGHT: 3.48 grams
PROVENANCE: Ex. property of a private collector, Paris.
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