Mastic or Mastix is a natural oleoresin, produced in the very small tree, Pistacia Lentiscus, as a physiological material. In order to obtain the oleoresin, however, it is necessary to make incisions in the trunk. The exuded oleoresin soon solidifies and becomes hard and brittle. Mastic is produced in various Mediterranean countries, but most of the world production comes from the small Greek island of Chios, just offshore from Izmir in Turkey. Smaller quantities are collected in Algeria, Morocco and the Canary islands.