Portrait of Augustus. Sardonyx cameo; gilt silver mount with pearls, sapphires and red glass beads, 16-17th centuries.
Dioscorides (engraver), Parisian workshop (mount)
CC BY 2.5
Marie-Lan Nguyen (<a href="//commons.wikimedia.org/wiki/User:Jastrow" title="User:Jastrow">User:Jastrow</a>), 2008-04-13