This object exists primarily or exclusively within the IDW Publishing continuity. Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Seven mystical gems with unlimited power.
Chaos Emeralds are objects mentioned in the  comic series published by Sonic the Hedgehog IDW Publishing. They are seven gemstones from Sonic's world with ties to the Master Emerald that hold incredible power.
Powers and traits
Possessing immense power, the Chaos Emeralds have the same properties as the
Sol Emeralds, except that they are not "fiery". Harnessing all seven Chaos Emeralds will bestow a person with a Super State, a form that grants increased innate talents and other powers.  
Sonic and Dr. Eggman have had numerous past encounters that involved them battling for possession of the Chaos Emeralds. The Emeralds have also been used by Sonic to achieve  his Super State. 
Fallout and The Fate of Dr. Eggman
Eggman Empire- Resistance war, Sonic used the Chaos Emeralds as base examples for a comparison to the Sol Emeralds when he explained the latter to Tangle. Later, after  Neo Metal Sonic took control of Angel Island and the Master Emerald, the robot recollected how the Master Emerald can neutralize the Chaos Emeralds and dared Sonic to try and stop him with them.
Color Blocks | Chaos Emeralds ( Extreme Gear) | Crystals | Emeralds | Emerald Shards | Forcejewels | Fake Emerald | Gems ( Blue, Green, Purple, Rainbow, Red, Sky, Yellow) | Great Emeralds | Master Emerald | Phantom Ruby | Phantom Ruby prototype | Precioustone | Sol Emeralds | Super Emeralds | Time Stones
Sonic the Comic Black Emerald | Grey Emerald | Chaos Emeralds | Master Emerald | Soul Crystal | Ultragem
Sonic the Hedgehog Deep Power Stone | Energy Crystal | Power Rock | Time Stones
Adventures of Sonic the Hedgehog Chaos Emeralds ( Immortality, Invincibility, Invisibility, Life, Ring)
Archie Comics Pre-SGW
Anarchy Beryls | Ancient Onyx | Chaos Emeralds ( Dark Mobius, In Another Time, In Another Place) | Freedom Emeralds | Guiding Star Gem | Master Emerald ( Dark Mobius) | Master Precioustone | Sol Emeralds | Super Emerald | Time Stone
Chaos Emeralds | Emerald Shards | Master Emerald | Sol Emeralds | Time Stones
Sonic Underground Chaos Emerald | Power Stone
Sonic X Chaos Emeralds | Master Emerald
Sonic Boom Chaos Crystals | Crystal Shards | Fregosi Sapphire | Lost Crystal of Power | Meroke Crystal | Tummel Crystal
IDW Publishing Chaos Emeralds | Master Emerald | Sol Emeralds