Wow. I’ve been trying to find a Doll’s Eye Crystal my entire life. Well, since June, anyway.
Willow Rosenberg[src]

Tara shows Willow her grandmother's Doll's Eye Crystal

At the start of their relationship, Tara Maclay showed Willow a Doll's Eye Crystal and offered it to her as a gift. Tara found it in her attic and believed that it belonged to her grandmother. The crystal's powers were never specified but it could be used to perform spells.