Bulla 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. 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.