El botón de nácar
- Tahun: 2015
- Negara: Chile, France, Spain, Switzerland
- Genre: Documentary
- Studio: France 3 Cinéma, Ciné+, Mediapro, Atacama Productions, Valdivia Film, Consejo Nacional de la Cultura y las Artes, CNC, RTS, France Télévisions, WDR
- Kata kunci: indigenous, concentration camp, dictatorship, chile, genocide, south america, button, colonialism, british colonialism, indigenous peoples, colonization, political prisoners, cultural genocide, water, settler colonialism, patagonia, kawésqar
- Pengarah: Patricio Guzmán
- Pelakon: Patricio Guzmán, Martín G. Calderón, Gabriela Paterito, Gabriel Salazar, Claudio Mercado, Raúl Zurita