The top of this specimen is largely covered with botryoidal scolecite that has formed over stilbite crystals, none of which are visible, except by viewing the side of the piece. The scolecite is composed of tiny, radiating, acicular crystals that form the botryoids. The specimen is actually pure, creamy white not the grayish look caused by the lighting in the pictures. Very nice specimen from one of the "other" large asbestos mines in southern Quebec, near the more famous Jeffrey Mine.