Chaos Emeralds (AOSTH)

The Four Chaos Emeralds are four mystical gems that Robotnik tried get by going back in time and use them to concor Mobius.

​Appearance
Each of them have a green colour, one looks like a shard, one looks like a crystal, one looks like a gem, one looks like a fake gem.

​Powers, Skills and Abilities
Each of these four gems have diffrent powers: Invisibility, Invincibility, Immortality and Life.

​Owners

 * Dr Robotnik (Formerly)
 * Shard (Currently)