You want to keep your jewels always bright and now I'll explain how to do it without having to resort to chemicals.
Equip yourself with a basin of dish soap and a toothbrush. Fill the basin with lukewarm water and dissolve a little 'dish soap (not exaggerated). Immerse your objects and let them soak for about ten minutes. While they are soaking, occasionally move them so that the soap penetrates well.
After ten minutes pull them out and brush each precious well doing well in the points where there are drawings if instead there are precious stones or gems diminish the brushing power or put some water in a saucepan or saucepan depending on the size or quantity of the items to be cleaned, immerse the items and bring to a boil, over low heat, add the dish soap in adequate quantities and leave for about 5-10 minutes.
Now rinse the objects well under cold water and with a soft microfiber cloth dry the jewels one at a time, make sure that the object does not remain wet.
To polish the object: take some cotton wool and add a splash of spirit on it (denatured alcohol) and rub vigorously on the object in gold, do not neglect any part of the object, for example if it is a faith clean well even the whole thing the inside of the ring. At this point you will have a new object in front of you.
If the gold in question has prolonged wear and is not as polished as you would like it could be because it is very scratched and this problem can unfortunately only solve a jeweler who has the right polishing machines.