A gemstone is a collective term for all ornamental stones that possess attributes like beauty, rarity, durability. Astral gems, apart from these material properties, increase the psychic powers of an individual by their curative powers. Astral gems also have the power to ward off the ill-effects of planets.

The gem stone should be set in the right metal and with the right weight. It should be worn on the correct finger of the working hand. Each gem, with its constant source of specific rays,gives rise to constructive vibrations that have therapeutic powers.

Gems are the wonders of nature available in various colors representing the quality of the nine planets that influence our earth and living things, especially human beings. The sages have clearly stated the color of the planets and their radiance etc without any gadgets by sheer clairvoyance. Incidentally, gems have similar radiance attributed to a particular planet. For example, Saturn was represented by blue sapphire, Jupiter by yellow sapphire, Mars by red coral etc.

In horoscopes, we find that some of the planets have lesser strength due to various types of afflictions. In order to offset these afflictions and to enhance the strength of the planet, a particular gem is prescribed like a medicine to cure the particular deficiency.