Gemstones and preferred finger

As per astrology, there are nine planets and all of them play a significant role in the life of a person. Therefore, in order to achieve the positive results from planets, a person can wear gemstones as per their association with their corresponding planet.
There are certain rules to consider before wearing any gemstone.
Ideal weight of the stone , in which metal the stone needs to be embedded, finger in which the stone needs to be fixed and the ideal time of wearing this stone.