Now I am pretty confident this is a piece of Prehnite with Epidote inclusions. Prehnite is known as the healers Healer and Epidote is a powerful stone to add manifestation of dreams. This piece has been strung on waxed cotton and knotted to make the length the crystal hangs at adjustable. If preferred i can re-work this piece with sterling silver into a pendant of a chain.
Raw Prehnite with Epidote inslusions on cord