When was "Glass cameo: Dionysos and a nymph" created?

This artwork was created 1st century BCE–3rd century CE.

What medium is "Glass cameo: Dionysos and a nymph"?

Glass cameo: Dionysos and a nymph is Glass ? opaque on blue [sic]; purple [CSL].

Yes, Glass cameo: Dionysos and a nymph is in the public domain and available for free download under CC0 license.

Unknown Artist

1st century BCE–3rd century CE

Medium

Glass ? opaque on blue [sic]; purple [CSL]

Dimensions

59/64 x 1 11/64 x 11/64 in. (2.3 x 3.0 x 0.4 cm)

Classification

Gems|Glass

Culture & Period

Roman · Late Republican or Imperial

Department

Greek and Roman Art

Museum

Metropolitan Museum of Art, New York, NY

Credit

Gift of J. Pierpont Morgan, 1917

Accession Number

17.194.9