there are a few cultures where Onyx is considered as a bad luck gemstone. They believe onyx brings bad luck, sadness,That it sucks the happiness from people’s lives and is responsible for sudden mood swings. It is also believed to raise anger and difficulty in people’s lives : nightmares, altercations, and family disputes. But the good news is: these are nothing but Myths bread in the mind of superstitious people and these are nothing but a series of eerie coincidences.