Sassanian banded agate seal AFG85
Banded agate seal depicting an ill-defined animal. Not drilled through, but was likely at the tip of an handle.
Found in Afghanistan.
Sassanid empire (AD 224-642).
Read The Art of the Sassanian and on Sassanian Seals from the Collection of the Late Edward Gans, at UC Berkeley here.
Diameter: 17 mm.