Each Nadi is made up of a particular ola or palm leaf, written in Vatta Ezhuthu , a Tamil script, with a sharp, nail-like instrument called Ezhuthani. The palm leaves are preserved by rubbing peacock oil on auspicious occasions. These palm leaves are still preserved in the Saravasti Mahal library of Tanjore(Thanjavur), in the South Indian state of Tamil Nadu.
The primary centre for Nadi Shastra is in Vaitheeswarankoil, near Chidambaram in Tamil Nadu, a state in South India. The palm leaf inscription of an individual is spotted out by his thumb impression. Lines on the thumb of people on the earth are are classified into 108 types. The Nadi palm leaves are arranged according to these types. The Nadi readers identify the particular types of lines on the thumb and the corresponding set of palm leaves are taken.The time duration to pick up your leaf depends upon the identification of the thumb impression. Some impressions are identified easily and the corresponding leaves are found soon.
Leaves are there not only for Indian nationals but also for foreigners and other nationals belonging to other religions and creeds.Destiny has leaves for those who wished to have their readings.It is also stated that about 40% of the people in the world only are likely to get these results as available.The other leaves might have been damaged or lost in the course of time.