Individuals should wear Cat's Eye gem stone if Ketu is posited in the 5th, 6th, 9th, or 12th house only when Ketu periods are operating. A three-day trial period is important to ascertain suitability of the gem. 

Individuals should wear Cat's Eye gem stones if Ketu is posited in the 9th or 11th house after a trial period of three days to ascertain suitability of the gemstone.

In this ascendant ruled by Mercury individuals in whose charts Ketu is posited in the 9th, 10th or 11th house should wear a Cat's Eye gemstone after a trial period of three days only when Ketu periods are operating.

In this ascendant ruled by Moon individuals in whose charts Ketu is posited in the 6th, 9th, or 11th house should wear a Cat's Eye gemstone after a trial period of three days only when Ketu periods are operating.

In this ascendant ruled by Sun individuals in whose charts Ketu is posited in the 8th, 9th or 11th house can wear a Cat's Eye birthstones after a trial period of three days only when Ketu periods are operating.

In this ascendant ruled by Mercury individuals in whose charts Ketu is posited in the 4th, 9th, or 3rd house can wear a Cat's Eye birth stone after a trial period of three days only when Ketu periods are operating.

In this ascendant ruled by Venus individuals in whose charts Ketu is posited in the 2nd, 3rd or 11th house can wear a Cat's Eye after a trial period of three days only when Ketu periods are operating.

In this ascendant ruled by Mars individuals in whose charts Ketu is posited in the 2nd, 10th or 11th house can wear a Cat's Eye stone after a trial period of three days only when Ketu periods are operating.

In this ascendant ruled by Jupiter, Cat's Eye gemstone should be worn only in Ketu periods after a three-day trial. Individuals in whose charts Ketu is posited in the 2nd, 4th, 9th, or 12th house can wear a Cat's Eye.

In this ascendant ruled by Saturn individuals in whose horoscopes Ketu is posited in the 2nd, 4th, 9th or 12th house can wear a Cat's Eye after a trial period of three days only when Ketu periods are operating.

In this ascendant ruled by Saturn individuals in whose horoscopes Ketu is posited in the 2nd, 10th, or 11th house can wear a Cat's Eye gemstones after a trial period of three days only when Ketu periods are operating.

In this ascendant ruled by Jupiter individuals in whose horoscopes Ketu is posited in the 1st, 2nd, 9th or 10th house can wear a Cat's Eye gemstone after a trial period of three days only when Ketu periods are operating.