What medium is "Sardonyx cameo with a nereid riding on Triton's back"?

Sardonyx cameo with a nereid riding on Triton's back is Sardonyx.

Is "Sardonyx cameo with a nereid riding on Triton's back" in the public domain?

Yes, Sardonyx cameo with a nereid riding on Triton's back is in the public domain and available for free download under CC0 license.

This artwork was created 1st century BCE–1st century CE.

Unknown Artist

1st century BCE–1st century CE

Medium

Sardonyx

Dimensions

Overall: 1 x 1 1/4 in. (2.6 x 3.2 cm)

Classification

Gems

Culture & Period

Greek or Roman · Hellenistic or Early Imperial

Department

Greek and Roman Art

Museum

Metropolitan Museum of Art, New York, NY

Credit

Rogers Fund, 1906

Accession Number

06.1205