Based on Lagna: In a zodiac sign there will be 12 Rasies. Lagna will change in each rasi from 1 hour to 2 hours approx so prediction of gems based on lagna will give 99% accurate.
Based on Nakashatra: Each Nakashatra rules a day 24 hours, rasi for 3 days and lagna between 1hour to 2 hours, so predicting of gems based by Nakashatra will be less results.Lagna based prediction of gems will give more perfect results, If a person don’t have exact time of birth they can follow by Nakashata as Nakashata will be for 24 hours.
Based on Rasi: In a zodiac there will be 12 signs each sign comprises 3 nakasharas and each rasi is ruled between 2 to 3 days so if we predict gems based on rasi will have less effect when compared to lagna.Prediction of gems based on lagna will give best results then nakashatra or rasi. If a person doesn’t have exact time of birth then we can predict gems based by his zodiac (Rasi) sign.
Based on Numerology: If we don’t have a correct time of birth, prediction of gems can be done through numerology.
Based on Name: This is one kind of prediction if we don’t have correct date of birth we can relay on this method.
Based on Dasa: If a person is running shani dasa, the gem of shani is prescribed, but this is not the correct way as shani may not be benefic planet in a horoscope, then it will give adverse results so we have to check correctly the present dasa is favorable or not then only after checking the 6, 8 and 12th houses then we have to prescribe the correct gem.
Based on Mounts on Fingers: Predicting gems based on mounts will give mixed results as we, cannot find lagna in finger prints, gems will be predicted by see the mounts only, this type of predictions will give mixed results, better to follow lagna based predictions, if not nakashara or rasi.
Based scientific method aura method: Aura is made up of a variety of vibratory rates or colors. Each area of the mind that awareness flows through reflects a change in these vibratory rates or colors in the human aura. The colors of nature are that of our aura color. Imbalance in this indicates disease or blockages, improper flow of Prana and more.