Strangely Pale Stone Shard

A strangely pale stone shard, surrounded by a halo of darkened stone.
Each time a shard is touched directly by flesh, a successful DC13 Con save must be made, or the shard accidentally slips in the hand, causing a severe cut for 1 point of damage.
Furthermore, if a shard is kept in the possession of a character, their dreams are filled with nightmares.