A bulla is a lentil shaped ornament which was often worn as a pendant. Its origins date back to the Etruscan era and it reappeared during the archaeological revival of the nineteenth century.

Etruscan Gold Bulla c.4th to 3rd Century B.C.
© The Trustees of the British Museum.

Castellani Bulla Pendant, Circa 1860.
Photo courtesy of Sotheby’s.