Robuta

https://www.worldhistory.org/image/5816/sardonyx-cameo-showing-nonsense-greek-inscription/ Sardonyx Cameo Showing Nonsense Greek Inscription - World History Encyclopedia Oct 5, 2016 - Skillful Roman cameo-carvers exploited the tonal contrast of some stones. This could be a simple two-tone contrast or a more subtle variation using all... sardonyx cameogreek inscriptionworld historyshowingnonsense https://www.christies.com/en/lot/lot-6438965 A ROMAN SARDONYX CAMEO PORTRAIT OF THE EMPEROR CLAUDIUS, CIRCA 41-54 A.D.; THE MOUNT ATTRIBUTED TO... CIRCA 41-54 A.D.; THE MOUNT ATTRIBUTED TO DANIEL MIGNOT, AUGSBURG, CIRCA 1593-1596