Ruby Red III - Green emeraldo (Smaragdgrün) is a 2016 German film directed by Felix Fuchssteiner and Katharina Schöde, based on the novel Green by Kerstin Gier, the third and last chapter of the Gem Trilogy and followed by the 2014 film Ruby Red II - The Secret of Zaffiro.Given the displacement in other films of the saga of some of the events in the third book, the film presents considerable differences compared to the paper version, taking the key points, but changing the circumstances and context.