Crystal Flower

The Crystal Flowers are five (later revealed to be six) mysterious objects, each existing in a different World. In order for someone to become the Platinum Princess and wear the Eternal Tiara, five Crystal Flowers are needed.

Human World Flower
It was the first crystal flower which was found by Yucie in the Elf Gardens, fairies live in the flowers.

Its a bright orange color.

Demon World Flower
The Demon World Flower was found by Yucie and Glenda after they defeated King Meow the First, as it was being used as the source of his powers. After taking the Flower, King Meow The First's castle crumbled, and all of his spells that had turned the people of the Demon World into cats were nullified.

It is bright red.

Heavens Flower
The third Crystal Flower was located in the Heavens, past a gate known as the Heaven's Door. The girls were sent to Heaven in order to retrieve it, and were told by Elmina's father that they would have to pass a series of tests before retrieving it, before the time ran out. Yucie, Glenda, Cocoloo, and most importantly Elmina faced three different trials; Knowledge, Force/Strength and Beauty, where they were asked to complete a series of tasks in order to proceed to the next floor. Despite Elmina's trauma of dancing in front of her father, she was able to overcome her problems thanks to her friends, and eventually attained the Heavens Crystal Flower.

The Heavens Crystal Flower's color is pink.

Fairy World Flower
The Crystal Flower of the Fairy World was located on the very top of the World Tree, the Fairy King.

Although none of the residents of the Fairy World knew where the Flower really was, and even Beth herself had never heard of its existence, it appeared before the Princess Candidates after Beth saved Cocoloo from falling off the top of the World Tree, saving her life.

Its color is green.

Spirit World Flower
This last crystal flower was found by Beth in a museum in Spirit World.

Its color is blue.

Magical World Flower
The true final crystal flower resided in the remains of what was left of the Magical World. It eventually revealed itself to Yucie and Maga Selent.

Its a bright yellow color.