Do Gemstones Really Have Powers? While we all love these precious stones, we need to determine Do Gemstones Work? If you are planning to buy a gemstone of your choice, keeping in mind your star sign but wonder about the Effects of Gemstones in How Many Days, the answer to this can be found online. If you do own a gemstone but are wondering How to Know if Gemstone is Working, this can be accessed online with the tap of a button too.This online method is very user friendly and you can avail the advice, suggestions of gemologists as well as astrologers which will help you gain better clarity on gemstones and their benefits