Gomati Chakra:

Gomti Chakra is also called as the Sudarshan Chakra as it resembles the divine weapon of Lord Krishna (Sudarshan Chakra). It brings good luck and is used specially in spiritual and puja rituals.

According to Vedas, it is beneficial to people who have 'Naag dosh' or 'Sarpa Dosha' in their horoscope. Set of Gomti chakras with mix size in odd numbers (Like 9,11) could be kept in Puja ghar, locker or business place.  These are natural pieces from under water with nature's inclusions and marks.