Tulsi Rosary is made with the Tulsi (basil) beads. It is the prefered beads to be used by followers of Sri Vishnu or Vaishnavites. They can used for Japa or can also be worn around the neck.
Diety - Sri Maha Vishnu/Krishna/Rama/Narasimha
Mantra - Om Namo Narayanaya, Om Namo Bagavathe Vasudevaya & Om Sri Venkatesaya