The Corona Aurora is a crown, resembling that worn in medieval Europe, but claimed to be of divine origin. It is also commonly called The Crown of the Gods. To prevent its capture by those of negative interest, a Sentinel Knight scattered the crown's jewels across Earth. Now Moltor has the crown, to which he desires to add the jewels. If all five jewels are put on the crown and evil wears it, all hope is lost. _______________________________________________________________________________________________________________________
Brownbeard's Pearl
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When the Eye of the Sea didn't fit on the hilt of the Sword of Neptune, the rangers gave it to Brownbeard. In exchange, he gave him his lucky pearl, which fit the sword and meant that it was the first jewel to the Corona Aurora.
Toru Diamond
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The ancient parchment revealed the location of the second jewel within a volcano. Mack and Tyzonn flew into the volcano using the Sonic Streaker. Tyzonn's scales protected him from the heat of the lava, allowing him to descend on a rope and retrieve the diamond. The power of the two jewels was enough to transform Tyzonn back to his human form.
Sapphire
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An ancient compass showed the rangers the way to the third jewel, hidden underwater, where Will, Dax, and Ronny retrieved it. Will was given the duty of delivering it to Hartford, but was attacked by Miratrix and Kamdor, and the Sapphire was stolen.