The Pearl Button (Spanish: El botón de nácar) is a 2015 Chilean documentary film directed by Patricio Guzmán.

It was screened in the main competition section of the 65th Berlin International Film Festival[1] where it won the Silver Bear for Best Script.

[4] It explores familiar Guzmán themes such as memory and the historical past, particularly that of history's losers rather than victors, recording some of the last surviving members of the original Alacalufe and Yaghan tribes.

The topics covered include the far north of Chile, which is the driest place on earth, where radio telescopes in the desert reveal new insights about the cosmos every day.

The film reveals how one corpse was washed ashore, and how one of the lengths of rail recovered from the sea had a mother-of-pearl shirt button encrusted to it.