Purifying Crystal

Description
This amulet appeared as a crystal-shaped vial made from glass, topped with a small cork and filled with mysterious silvery liquid and a string made of very fine glass beads. When a mutant wore the amulet, the effects of their mutation reverse themselves over the course of an hour, a process that feels somewhat uncomfortable over its process. When the amulet was removed, the mutation returns at the same speed.

Uncorking the amulet and drinking the silvery fluid on the inside had no effect, and destroyed the artifact forever.