While buying a gemstone, people are usually attentive about the shape of the gemstone. Each cut and shape has different characteristics. When you buy a gemstone, look for the one that is well-cut without any marks on it. To gain the correct astrological results, the ring or pendant should be designed in manner that it touches the skin and the rays are allowed to pass through the gemstone to enter the body. Gemstones are worn for drawing additional energy from the respective planets. So, if a particular planet is weak, one should wear a gemstone in order to derive the required strength.