Master Emerald

he Master Emerald (マスターエメラルド Masutā Emerarudo) is an object that appears in the Sonic the Hedgehog series. It is a large, green emerald and a mystical relic from the untold past. Created as a balance against the Chaos Emeralds, the Master Emerald possesses immeasurable powers and allows the one controlling it to nullify and control the Chaos Emeralds, making it one of the most prominent objects on Dens and a valuable gem. The Master Emerald rests on Angel Island where its power keeps the island floating in the sky. Over the millennia, the Master Emerald has been guarded by the surviving Echidnas of the Knuckles Clan, with many people having tried to steal it throughout history, and each time, they were thwarted. In the present day, the current guardian of the Master Emerald is Knuckles the Echidna.