The Ivory Carving ClipArt gallery offers 6 examples of the art from various regions and time periods.
"Leaf of a diptych, Roman, probably about 4th century, South Kensington Museum collection." —…
"Mirror case illustrating storming of the Castle of Love, French, about 14th century, South Kensington…
"Plaque; apparently used for inlaying, Nineveh collection." — The Encyclopedia Britannica, 1893