Master Emerald (Earth-6515)

"The Master Emerald contains special powers that neutralize the energy of the Chaos Emeralds. That makes it very powerful!"

- Knuckles Echidna

The Master Emerald is a special gem that appears in the Sonic Hedgehog series. A massive green emerald, it is a mystical relic of unimanigable power from the past. Created by the gods, it acts as a counter to the Chaos Emeralds, and those who control it can nullify the power of the Chaos Emeralds.