Gems and precious metals are used to balance planetary influences and to act directly on life force. If gems are to be used for healing, they should be purified by immersing in salt water for at least two days. Water sacred places is also sometimes used, such as water from the Ganga. Their power can also be enhanced by chanting sacred syllables and mantras over them.
Gems are most effective when they more than two carats and are worn in contact with the skin.
If a precious stone of two carats or more is not available,it is better use a semi-precious stone that is larger. To allow the direct contact with the skin all rings and pendants should have an open backed setting and the preffered metal is gold. Some of the stone include the Topaz which is said to decrease Vata and helps to relieve fear. Precious stone like Diamond, Sapphires Rubies and semi precious stone like Lapis Lazuli,Coral,Beryl and Moonstone-have their own attributes and are recommended to correct various imbalances in the body.