Avoid chlorine, including that in swimming pools and hot tubs. To clean, you can use a solution of ammonia and water (half and half) and use a soft tooth brush that's never had toothpaste on it. Be sure to rinse. You can also take it to a jeweler and have them put the jewelry in an ultrasonic cleaner. If the diamond is prong set, you should take it to have the prongs checked at least once a year to make sure they’re intact and that the stone isn’t loose. Prongs have a tendency to catch on threads and get pulled up. They can also be weakened if exposed to chlorine.

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Answer:
Taking care of gold is very simple. Just dip them into concentrated tea and leave them for 30 mins. They will look new and more shinier.