This is indeed an effectual way of intensifying the benefits of favorable planets in birth chart or horoscope of a native. This is the basic introduction about the effects of Gems. The Most important thing is to ascertain which is the Gem that will bring about maximum benefit to an individual. It is most important to identify which gemstone will suit an individual’s chart. Gemstones such as Blue Sapphire, Cat’s eye, Coral are so strong that if not chosen carefully they actually act in a negative manner and bring about the downfall of a person. A careful scrutiny of the feeble strength of the planet or planets then leads to selection of an appropriate gem of suitable weight and clarity.