Gold jewellery is as popular today as it was hundreds and even thousands of years ago. It is shiny, durable and valuable. Gold is made into necklaces, rings, bracelets, earrings and many other bodily adornments. Gold jewellery does not tarnish like silver; however, the alloys mixed in with the gold do react to such things as bleach and chlorine, which may turn your beautiful white or yellow gold black.
Stop exposing your jewellery to chlorine and bleach. Do not swim or use a hot tub with gold jewellery on. Remove your gold rings before doing any cleaning that involves using any bleach and other cleaners. You should stop this even before you notice your jewellery turning black, but especially afterward.
Clean your gold jewellery with a mild soap, like dish detergent, and warm water. Dip a soft brush, like an eyebrow brush, into the soapy water and gently scrub the blackness off your jewellery. Rinse well and rub with a lint-free cloth.
Take your jewellery to the jeweller, even though you may not want to. Your jewellery has been damaged, and it could continue to corrode. Before you lose a diamond or other precious gems, or before your jewellery falls apart, seriously consider letting him properly buff and clean it for you, if possible.