The Master Emerald is an giant gem that is very powerful, and can turn your thoughts into power. Because of it's massive power, Knuckles the Echinda guards it. It is a very important item, passed down in the Echinda Clan.
In the IALR series, the Master Emerald currently is only an item that is only mentioned. However, soon, it is intended to have Knuckles carry the Master Emerald around with him.
- The Master Emerald is around as powerful as all seven Chaos Emeralds.