Engraved Gem with a portrait of Demosthenes inset into a gold ring by Apelles https://www.rawpixel.com/image/14247362/engraved-gem-with-portrait-demosthenes-inset-into-gold-ring-apellesFree Image from public domain licenseCameo with Pan, a Maenad, a Satyr and a Goat inset Into a Ring by Sostratos https://www.rawpixel.com/image/14247327/cameo-with-pan-maenad-satyr-and-goat-inset-into-ring-sostratosFree Image from public domain license