Wellknown scriptures like siva purana, padma purana, rudra jabalopanishad, Devi purana etc describe the holyness and mahima of rudraksha bead. All puranas describe the rudraksha bead as divine and powerful. Also compares rudraksha with lord Shiva himself.
Born out of eyes of lord Rudraksha, it is popular in the world as "Rudraksha".
Even when a dog dies with rudraksha on it's body
It attains rudrapada, what then to speak of human beings!