What medium is "Stamp seal fragment: unicorn and incense-burner (?), inscription"?

Stamp seal fragment: unicorn and incense-burner (?), inscription is Steatite, burnt.

Is "Stamp seal fragment: unicorn and incense-burner (?), inscription" in the public domain?

Yes, Stamp seal fragment: unicorn and incense-burner (?), inscription is in the public domain and available for free download under CC0 license.

This artwork was created ca. 2600–1900 BCE.

Unknown Artist

ca. 2600–1900 BCE

Medium

Steatite, burnt

Dimensions

Seal Face: 3.87 x 3.87 cm Height: 1.97 cm

Classification

Stone-Stamp Seals-Inscribed

Culture & Period

Indus · Mature Harappan

Department

Ancient Near Eastern Art

Museum

Metropolitan Museum of Art, New York, NY

Credit

Dodge Fund, 1949

Accession Number

49.40.3