Rudraksha Diksha

I want to know more about Rudraksha
What is Vibhuti?
How is Isha Vibhuti consecrated
Where do I apply Vibhuti
What is Abhaya Sutra
What material is used to make the Abhaya Sutra
How to make use of the Abhaya Sutra
I wish to know more about Abhaya Sutra
Who is Adiyogi and what is his significance today