Sol Emerald



A set of Emeralds from another dimension, the Sol Emeralds (ソルエメラルド Soru Emerarudo) appear in Sonic Rush, as well as in its sequel Sonic Rush Adventure, where they are guarded by Blaze the Cat. They are similar in function to the Chaos Emeralds, but they are rectangular in shape (emerald cut) unlike the pointed shape (brilliant cut) of the Chaos Emeralds. Like the Chaos Emeralds, all seven can be used to achieve a transformation (Burning Blaze in Blaze's case). Also, like the Chaos Emeralds, they are powered by positive emotions, which allows Blaze to restore them after they were drained by Eggman and Eggman Nega. It is also interesting to note their magnetic properties - both Eggman and Eggman Nega quote that the Chaos and Sol Emeralds can attract and repel each other, and this power could destroy the world. There is currently no known Sol equivalent to the Master Emerald (although it is possible that the Jeweled Scepter is the Master Sol Emerald, but this is unconfirmed).

Etymology
"Sol" translates to "sun" in a variety of languages, and is the origin of the word "solar".

Trivia

 * In Sonic Rush Adventure's epilogue, it is revealed that the Chaos Emeralds and the Sol Emeralds are connected like the North and South poles of a magnet.
 * In Sonic the Hedgehog (2006), there are items called Custom Gems that strongly resemble the Sol Emeralds. Each one gives Sonic a new ability.
 * In Sonic Rush Adventure, a person in Southern Island will give you missions, that if beaten, will unlock a Sol Emerald.