Gold Jewellery tends to tarnish with time and usage, to avoid this, stretch out the gold chain in an anti-tarnish tissue and roll it up and position in your jewelry box in a flat position. It helps prevent the chains from getting knots that can minimize the occurrence of tarnish.
One can even store precious jewelry like Gold Necklace, Gold Chains & Gold Bangles in a plastic zip bag. Just make sure you will tapper out all the air before closing it.
You should ensure to store your gold Jewellery in a soft, dry cloth, keep away from sunlight and it is recommended to store in a dust free environment.