I've personally experienced the frustration of my necklace turning black over time. This happens mainly due to tarnishing, which occurs when metals like silver react with sulfur or oxygen in the air, forming a dark layer on the surface. Sweat, lotions, perfumes, and even the natural oils from our skin can also speed up this process. To prevent your necklace from turning black, I've found a few simple methods effective: first, keeping the jewelry dry and storing it in an airtight container or anti-tarnish pouch helps greatly. Avoid wearing it during activities that cause sweating or exposure to chemicals like swimming pools or cleaning products. Regularly cleaning the necklace with a soft cloth, or gently using a cleaning solution specially designed for your metal type, can restore its shine. Additionally, some people apply clear nail polish as a protective coating to slow down oxidation. However, if you notice the blackening has already set in, using baking soda paste or a commercial silver cleaner can safely remove tarnish. These small steps have really extended the life and look of my jewelry, so if you’ve been wondering 'mom why is your necklace turning black,' there’s a lot you can do to keep your pieces looking new for longer.