Glues practical work with

Horn can be inlaid with silver pique work or with mother-of-pearl. As with tortoiseshell, this is done imder heat and pressiure, and the material to be inlaid is pressed into place. It is not necessary to carve out a hollow for the inlay. Theoretically, it should not be necessary to use glue as the material will contract to hold the inlay as it cools, but in practice, glue is often used. 

---