As we are well aware of the Fact that Gem Rings / Gemstones have a cosmic energy and they absorb and reflect Back the Negetive vibrations of that malefic planet and allow positive effects to reach us. But while we use these Gem Stones we absorb its Energy day by day and after a Certain Period of time these Gem Rings and Gem Stones become Useless for the Wearer. All the Precious Gem Stones have a Life of 3.5 Years Only and all Semi - Precious Gem Stones have a Life of 1 Year Only. After the Regular Use for these period Gemstones stop giving their Positive Results. Therefore it is Advisable to Change Your Gem Rings / Pendants after its expiry time. But Please Note Gem Rings should be worn only after proper Mantra Healing to get its Proper Results.