It comes from elephants that have been culled, from elephants that die of natural causes, and from illegal hoards that have been confiscated.
Sinna kuulub elevandiluu, mis on saadud seaduslikult tapetud elevantidelt, loomulikku surma surnud elevantidelt, ning ebaseaduslikult tapetud elevantide luu, mis on konfiskeeritud.