Moolavar of this ancient temple was made of blue diamond and it
blessed many heavenly personages like Vaaruni, the son of Rain-God
and Surya in the dim past. It is a big temple, and on account of the
Sun-god's installation of the Sivalinga, made of diamond, the
archamurti is called Adi Ratneswarar. Moreover, He is more popular
as Aaadanai Nathar, since Vaaruni, the pet son of Varuna, the rain
god was relieved of the curse of Durvasa. It is an exciting legend.
Once, it is said that Vaaruni incurred the displeasure of Durvasa
for an insignificant mischievous act. Being the anger incarnate,
Durvasa cursed Vaaruni to turn into an elephant with a goat's head.
An obnoxious form and unbearable sight also. That cursed beast
about everywhere for emancipation came here and with this Lord's
mercy got back his former form. Since then He is called the Aaadanai
Nathar. It has two holy thirthas situated both in and out of the
prakara. A largely visited temple, conducting many festivals on a
lies 34 km off Kalayar koil, another temple town of great fame.