Daughter of the Earth

The Daughter of the Earth is a treasure in. It is actually a purple.

Crackling Cauldron
There is a Daughter of the Earth located on the second sublevel of the Crackling Cauldron. It is buried in the middle of the large sizzling floor, near the entrance of the sublevel. Use Red Pikmin to extinguish the sizzling floor, and you'll be able to dig up the treasure and simply carry it to the S.S. Beagle.

Engulfed Castle
There is a Daughter of the Earth completely buried in the southeastern corner of sublevel 2 of the Engulfed Castle. It can be located with the Treasure Gauge or Oatchi. To collect this treasure, you must throw 12 Pikmin in its vicinity.