The Sol Emeralds (ソルエメラルド Soru Emerarudo) are objects that appear in the Sonic the Hedgehog series. They are a set of seven emeralds of great power from earth in the Sol Dimension. They are, by custom, protected by the Sol Empire's imperial princess, with their current guardian being Blaze the Cat. Known as the greatest treasures of their world, the Sol Emeralds are sought by heroes and villains alike due to their immense power.