|The Master Emerald|
The Master Emerald is known as the Chaos Emeralds "controller".
|Series||Sonic the Hedgehog|
|First Appearance||Sonic & Knuckles|
|Purpose||Keeping Angel Island afloat, Neutralizing or empowering the Chaos Emeralds, Supressing Chaos|
Knuckles the Echidna
|Description||Large, green, diamond-cut Emerald that resides in Angel Island|
The Master Emerald (マスターエメラルド, Masutā Emerarud) is a massive, mysterious gem, held on Angel Island and guarded by Knuckles.The Master Emerald possesses the ability to control the Chaos Emerald's power,meaning it can stop the energy of the Emeralds, or enhance them.