Im not a jewelry expert, but I've had several people say it would be from the later 1800s. Seems to need a cleaning. Seems to have 6 seed pearls around the cameo. Stamped 14k on inside of the band. The item "ANTIQUE VICTORIAN CARVED SARDONYX, CAMEO RING 14K GOLD size 4.5 black onyx" is in sale since Sunday, December 13, 2020.
This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Victorian, Edwardian 1837-1910\Cameos". The seller is "buffalobreeder" and is located in Clyde, North Carolina. This item can be shipped to United States.