Essence of Rage

The Essence of Rage is a treasure in Pikmin 2 that is actually a ruby mounted on a silver circle, the treasure is buried in the snow on the 1st sublevel of the Frontier Cavern and require White Pikmin to dig it up. It is the 111th treasure on the List of Pikmin 2 treasures in the NTSC version and the 110th in the PAL version.

Captain Olimar's Journal
"This crimson jewel was found in a hole deep below the icy surface. When viewed from a distance, the gem's dazzling red sparkle looks like a dancing flame. Of course, the dancing flames may just be a symptom of acute hypothermia."

Sales Pitch
"The sight of this may warm you when you are cold, a lovely side effect of this valuable treasure."