Vedic astrology emphasizes the use of remedial measures to mitigate or nullify the negative effects of planets and to strengthen the positive energies of the benefic planets. The use of gemstones has been found to be one of the best remedies. The choice of suitable gemstone mainly depends on the ascendant and planetary position in your chart. Careful selection of a gem can bring about prosperity, mental peace and success. The planets are divided into two major groups: Sun, Moon Mars and Jupiter are combine to form one group. Saturn, Mercury, Venus, Rahu and Ketu form other another group. Generally, with a few exceptions, gemstones from an opposing camp are not recommended to wear. If your Ascendant is Aries, the ruling planet is Mars. You would wear a gemstone from that camp of planets: Sun, Moon, Mars and Jupiter. And vice-versa with the other group. There are various methods for choosing the right gemstone. The best way is to identify the key planets that control an individual's life and then see their positions in the chart. One should wear the gemstone of the planets which are favorably placed in the horoscope. Planets which are not favorably placed are best to be pacified by chanting their mantras and stotras (prayers) and donating articles represented by these planets.
Gems are natural products which are found in different natural colours. Planets which affects human life also represents different colours. Gems and human beings both are composed of five elements i.e. fire, earth, air, water and sky. These five elements are also represented by nine planets and twelve signs of the zodiac. All the nine planets of the zodiac represent a particular elements, colours, gemstones and metals.
Planets
Element
Colour
Gem Recommended for the Planet
Metal to be worn
Sun
Fire
Red
Ruby
Gold
Moon
Water
White
Pearl
Silver
Mars
Fire
Orange
Coral
Gold or Silver
Mercury
Earth
Green
Emerald
Gold
Jupiter
Sky
Yellow
Yellow Sapphire
Gold
Venus
Water
White
Diamond
Gold or Platinum
Saturn
Air
Blue
Blue Sapphire
Gold or Panch Dhatu
While analyzing horoscope an astrologer can identify weak planets or the planets unable to give desired results due to the affliction and he can recommend the type of gem accordingly to get favorable results. Rahu and Ketu are also considered important in the Vedic astrology. Garnet should be worn in the silver ring for Rahu and cat's eye should be worn in the gold ring for Ketu. Gems which are to be used for remedial purposes are selected with specific weight, colour and transparency. Selection and use of gems should be made very carefully and be worn on the correct day in the correct finger and in correct metal. Gems should be worn after performing prayer or chanting of mantras which is different for different planets to get positive results.