Puranas glorify the sanctity of rudraksha. Shiva Purana says that it is a favorite string Shiva and all sins are removed by their views and contact (Vidyesvara Samhita 25.2). Anyone who wear it on his hands, arms and over 17 head, can not be killed by any living creature and Such a person would always be respected by gods and asuras. A mantra repeated rudraksha is a crore times more effective. also early death does not affect the wearer in least.
Padma Purana adds that a man may be a lakhfold credentials by seeing it and a crore-fold merit by touching it and ten crores of merit by wearing it. Furthermore, even if a predator take a rudraksha in the throat dies, it would also get Rudra-hood (rudratvam).
Agni Purana, while discussing the benefits using different types of rosaries, says that one made of rudraksha gives emanicipation (Mukti). Origin of Rudraksha is by Shiva that is accepted by all puranas.