Moonstone

Moonstone is a blue jewel with a form of sphere which is featured in the movie, Tinker Bell and the Lost Treasure.

Tinker Bell and the Lost Treasure
The Moonstone was always placed in the Scepter, for each eight years on full blue moon so Pixie Hollow would blue Pixie Dust, that was used to help the Pixie Hollow Tree. Tinkerbell then took it home as she then broke it. In despair Tinkerbell went to an island due north of Neverland, to search for the Mirror of Incanta, which granted three wishes but two were spended as then only one wish was left.

Tinkerbell to restore the gem tried to wish for the Moonstone to get back to its circular shape but accidentally she wished for Blaze to be quiet. After no luck her only hope was to make its shape different, with Terence's help they made a new shape.

By using all the pieces, along with a diamond Tinkerbell had found, they designed the scepter so that when the blue moon shined through the diamond, it refracted the light into the moonstone pieces, maximizing the effect, and creating more blue pixie dust than ever had been seen at any prior Autumn Revelries.

Sailor Moon
The Moonstone was created by Queen Serenity. It can grant any wish to the one who possesses it. The Moonstone first appeared in FernGully 2: The Magical Rescue when Serena found it in the chest in FernGully. She became a holder of the Moonstone, but Professor Norton Nimnul have used the poachers to capture the moon cats Luna and Artemis and forced them to locate it. The Toon Patrol steal the Moonstone from Sailor Moon. Nimnul and the Toon Patrol then take the Moonstone to the summit of Mount Warning where they use its powers to create a newly-rebuilt Pilaf's Flying Fortress. However, once the baby animals are safe, Nimnul betrays Mac and Boss for their failures and takes the Moonstone for himself. Nimnul attempts to use the Moonstone's power but Sailor Venus soon uses Crescent Beam to destroy it. Sailor Moon defeats Nimnul and the care of the Moonstone is left to Luna.