An engraved sapphire hololith, meaning a ring carved from a single stone, with a gold band mounted on the inside, likely during the Middle Ages. It might have to have belonged to Roman emperor Caligula, with the engraving representing Caligula’s wife Caesonia [1164×952]

An engraved sapphire hololith, meaning a ring carved from a single stone, with a gold band mounted on the inside, likely during the Middle Ages. It might have to have belonged to Roman emperor Caligula, with the engraving representing Caligula’s wife Caesonia [1164×952]

by LensofaTitan