Precious cat's-eye (LEHSUNIA) the rarest and most highly prized, is a greenish chatoyant variety of chrysoberyl called cymophane.
To reduce the ill effects of Ketu, one should wear cats eye gemstone. People in whose horoscope Ketu is in the 1st, 3rd, 4th, 5th, 9th and 10th house. Wearing the stone will be beneficial for those people. If Ketu is with the Sun or aspected by the Sun in the horoscope, then this gemstone should be worn.
The Cat's eye gemstone can be made into a ring or a pendant with silver or in panchdhatu. This ring should be worn on the middle finger of the right hand on a Tuesday Morning during Krishna Paksha (descending moon) before sunrise.
The precious stone gets its name owing to similarities with the colour and shape of a cat's eye and is worn primarily to reduce the evil effects of the heavenly body Ketu. Business persons, family men as well as housewives who are facing debt can find relief by wearing the precious stone of cat's eye.
A real cat eye stone is hard and it will not break when it is rubbed against a hard substance. Thus, to find out whether cats eye is real or fake, you can rub it against a rigid substance and if it imposes a smudge doing so. Then it is a fake stone.