Antique 19th-Century White Marble Table Lamp

An antique, 19th-century white marble table lamp, with carved flower designs on both sides, and a brass ormolu base. Probably French Empire, c. 1870-1890; possibly Italian. Chip on top rim, as shown. One base corner a little rough. Early rewiring. The top has an unusual piece, and needs a top finishing nob or just a new finial. Looks to be marble (not alabaster). 3.75" wide by 8.5" to the top of the marble, 11.75 to the top of the socket, and 18" to the top.