Natural stones - especially the precious and semi-precious varieties, will never have negative effects, per se. Yes, even Blue Sapphires/ Neelam. In our long experience with real stories, we have come to learn that these gemstones never harm, or bring malice to us. Apart from increasing positivity, your stone may also be DECREASING negativity in your life. Still, if your gemstone doesn't suit you, we have a clear exchange policy that requires the gemstone in its original condition and proof of purchase. There are no fiat returns for worn gemstones, as we do not trade used gemstones as a matter of ethics. However, you are welcome to select and upgrade your stones by availing yourself of store credit usable by anyone who accompanies you. Please read our Exchange Policy here.