Since millions of years, the gemstones have been receiving and emitting cosmic vibrations, owing to their unique chemical and electromagnetic attributes. Astrology is based on the fact that cosmic force of planets governs human body and life. The cosmic structure (signature) imprinted on us, at the time we were born defines our physical, intellectual, emotional, spiritual and even karmic self. Not every planet is all-powerful at our birth time, and each planet gives varied effects on each individual.

One of the major concerns of an astrologer is to study the Horoscope, analyze the effect of each planet and assign the gemstone to enhance the required celestial force in our body and life. The enhancements in the particular planetary vibration we receive from that gem help us to achieve fulfillment in our personality and destiny. The electromagnetic vibrations of the gems interact with the aura of our body while in touch with our skin. It then forms a sort of productive energy on `union`, which brings about the change in the following spheres of our life.

The Gemstones affect our physical well being, since the physical immunity is increased, and corresponding gems helps in achieving ineffectiveness from certain ailments. They also align a particular Chakra in our body. This not only increases our health, but also enhances the overall energy level of the body to a greater height. Gems direct our emotional and mental faculties, and help in achieving higher grounds by attaining inner peace and wisdom.

Apart from this, the gemstones impart a protection from psychic and mental influences and lastly gems helps in changing the karmic pattern of the person, in relation with the placement of that planet in a particular house. A gemstone brings significant change only when in alliance with the aura of a person. Hence, it is advised to wear the stone consistently and not take breaks for a long time. Gems create a protective field around the body, which regulates celestial forces absorbed by the body. In time, the proper gemstones, if kept in contact with the skin, can bring about miraculous changes in mind and body.

Gemstones are categorized as Pancharatna & Saptaratna.
1. Panchratna: It is the five gemstones that correspond to the five basic elements considered in Vedas. The five elements and their gemstones are:

Element	Gemstone
Fire / Agni	Ruby / Manik
Water / Jala	Pearl / Moti
Earth / Prithvi	Emerald/ Panna
Air / Vayu	Diamond / Heera
Ether / Aakash	Blue Sapphire / Neelam

2. Saptaratna: The light ray is the combination of seven colored rays or `Rainbow`. The seven planets - from Sun to Saturn correspond to these seven colors. On the basis of these seven color-planets, the corresponding gemstones are classified as Saptaratna.

Color	Planet	Gemstone
Red	Sun / Surya	Ruby / Manik
Orange	Moon / Chandra	Pearl / Moti
Green	Mercury / Budh	Emerald / Panna
Yellow	Mars / Mangal	Blood Coral / Moonga
Indigo	Venus / Shukra	Diamond / Heera
Light Blue	Jupiter / Guru	Yellow Sapphire / Pukhraj
Violet	Saturn / Shani	Blue Sapphire / Neelam

Gemstone Harmony
Not every planet is in harmony with the other celestial bodies. Likewise, the vibrations of the two conflicting planets (corresponding gems) should not be mixed. The effects are nullified or result in an unbalance. A particular gemstone should not be worn with the conflicting planetary gemstones. Thus, one should understand the compatibility of the gemstones with each other.