The Pearl Button Allende to rehabilitate the surviving tribespeople; the concentration camps set up under Pinochet; how inmates were tortured and how their bodies, weighted with lengths of rail, were dropped from helicopters into the Pacific; how one corpse was washed ashore; and finally how one of the lengths of rail recovered from the sea had a mother-of-pearl shirt button encrusted to it. The Pearl Button The Pearl Button () 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 where it won the Silver Bear for Best
Pearl this process, the pearl sac seems to travel into the shell; however, the sac actually stays in its original relative position the mantle tissue while the shell itself grows. After a couple of years, a pearl forms and the shell may be found by a lucky pearl fisher. Cultured pearls are the response of the shell to a tissue implant. A tiny piece of mantle tissue (called a "graft") from a donor shell is transplanted into a recipient shell, causing a pearl sac to form into which the tissue precipitates calcium carbonate. There are a number of methods for producing