Watch The Last Diamond for Free: How to Stream the Movie Online at 123Movies. . Simon, a burglar on probation, agreed to go on the biggest shot of his life: The flight of the "Florentine", a mythical diamond set auction by its owners. To succeed, he must approach Julia, expert diamond for sale which is a considerable personal and family issue. Beyond a jigsaw particularly daring, Julia Simon will lead to a destiny she could not imagine.