Kamdhenu (Kamadhenu) with calf - the wish fulfilling cow raisin idol Janeu Cat's eye mala is used

Cat's eye mala is used for japas of planet Ketu

Seek devotional alignment and balance

The reason is

though sometimes it’s displayed in art

Kamdhenu (Kamadhenu) with calf - the wish fulfilling cow raisin idol Janeu Cat's eye mala is usedKamadhenu (Sanskrit: Kmadhenu), also known as Surabhi ( Surabh), is a divine bovine goddess described in vedic scriptures as the mother of all cows. She is a miraculous "cow of plenty" who provides her owner whatever he desires and is often portrayed as the mother of other cattle as well as the eleven Rudras. In iconography, she is generally depicted as a white cow with a female head and breasts or as a white cow containing various deities within her