Emerald

An emerald is a type of precious gemstone, usually colored green. Examples of Emeralds in the Sonic the Hedgehog series include:

Chaos Emerald, a special gem with mystical properties and abilities.
- Chaos Emerald (Sonic the Comic), the version of the Chaos Emerald from Sonic the Comic.
- Chaos Emerald (Archie), the version of the Chaos Emerald in the Sonic the Hedgehog Archie Comics.
- Chaos Emerald (Adventures of Sonic the Hedgehog), the version of the Chaos Emerald from Adventures of Sonic the Hedgehog.
Emerald (Sonic and the Black Knight), an item in Sonic and the Black Knight.
Master Emerald, a large Chaos Emerald usually guarded by Knuckles the Echidna and his kind.
- Master Emerald (Archie), the version of the Master Emerald in the Sonic the Hedgehog Archie Comics.
- Master Emerald (Sonic the Comic), the version of the Master Emerald from Sonic the Comic.
Super Emerald, powered-up Chaos Emeralds from the game Sonic the Hedgehog 3 & Knuckles.
- Super Emerald (Archie), the version of the Super Emerald in the Sonic the Hedgehog comics.
Sol Emerald, emeralds which are usually protected by Blaze the Cat.
- Sol Emerald (Archie), the version of the seven Sol Emeralds in the Archie Comics.
Grey Emerald, a powerful Chaos Emerald from the Sonic the Comic continuity.
Black Emerald
- Ancient Onyx, an emerald used to imprison Chaos in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics.
- Black Emerald, an emerald from the Shadow Dimension in Sonic the Comic.

Locations

The following locations include the word "Emerald" in their names:

Emerald Hill Zone, the first stage of Sonic the Hedgehog 2
Emerald Coast, the first stage of Sonic Adventure, and also the first board in Sonic Shuffle
Emerald Coast (Sonic X), a beach in the Sonic X continuity
Emerald Ocean, a race track in Sonic Drift 2
Emerald Town, the main setting of Sonic Battle
Emerald Beach, a beach at Emerald Town and an arena in Sonic Battle
Emerald Chamber, the resting place of the Chaos Emeralds in Sonic the Comic
Emerald Valley Bridge, a bridge in Sonic the Comic
Emerald River, a river in Sonic the Comic
Radiant Emerald, the final track of Sonic R.
Altar of the Emeralds, a place where the Master Emerald is kept and guarded.
Altar Emerald, the final Zone of Sonic Advance 3.