I am not sure


 I am not sure about suggestion of 5 carat. Though putting bigger moonga stone would not harm you as long as pocket allows 🙂 Copper could be chosen as it’s believe to be ruled by mars in our vedic astrology. 

I think you should go ahead with what venus jweller suggested.  min 5 carat moonga in coper ring. remember to take the finger size before placing order.