- For the item found in Corpse Party: Book of Shadows, see Amethyst.
- For the similar protective item in Corpse Party: Blood Drive, see Talisman.
The Power Stone (パワーストーン Pawā Sutōn ) is an item found in Corpse Party. It is able to keep away bad spirits and to protect anyone from danger.
The power stone can be found by Yui in the classroom 1-A. When given to Ayumi and Yoshiki it offers them one time protection against any danger in the school. It shatters itself if the player gets in touch with Ryou Yoshizawa, if the player tries to read the fifth part of the "Victim's Memoires" or if Yoshiki tries to leave Ayumi alone while she is suffering from the darkening in the lavatories. In all the situations, Yoshiki is able to hear his teacher's voice asking if she managed to save them if caught by the ghost, suggesting to not read the pages, if trying to read the Victim's Memoires, and suggesting to not leave Ayumi alone, if trying to leave her alone.
- This is one of the only two items that can be collected by Yui in Corpse Party, The other one being Classroom 3-A Key.
- If the power stone is kept throughout chapter 2 it will not be in the players inventory when you regain control of Ayumi and Yoshiki in chapter 4. The reason for the loss is because each chapter from the original PC version was sold separately and the PSP version only ported it without making any modification.
- Both this item and the Amethyst share the same icon only the stone is flipped.