'"Pendant or medallion [from Mohenjo-daro] pictures the unicorn combined with many sacred symbols of the Indus religion. The body of the figure has a womb-shaped symbol in its belly, the same motif is elaborated to form the frame for the pendant, which is also a common design for shell inlay. Two leaf shapes of the sacred pipal tree are depicted at the animals shoulders and rump. A ritual offering stand is placed in front of the image. The deeply incised frame and the symbols on the unicorn would have been set with inlay." (J.M. Kenoyer, Indus Civilization, p. 188)
See also The First Unicorn Seals.