Hexagonal Crystal

This was given to Koyuki Kazahana by her father as a child.

Appearance
As its name implies, it is a hexagonal, purple crystalline stick with indent at the bottom, while the top has a key-hook with a string, making it a necklace.

History
Though Koyuki lost faith in her father's beliefs, she still kept the crystal with her. It was later revealed to be the key to a generator to turn the Land of Snow into the Land of Spring. Kakashi had replaced it with a fake key, but Dotō found out the duplicity, and managed to procure the real one. Dotō incorrectly believed that it leads to a great treasure, and sought to take the key for himself, only to be infuriated when he saw the generator.

Cristal Hexagonal