Gem Stones allow only one type of energy related to a particular planet into our body. So the problems related to that planet can be alleviated by wearing a gemstone. Most people wear Gem Stones depending on their birth star, moon sign or sun sign, or just for fun. This is dangerous. An Astrologer can prescribe a suitable gem for you only after a complete analysis of your horoscope. You can find more information about various gems by clicking here.