If you wear gold necklaces, bracelets or rings on a daily basis, you may wind up wanting to shine them up now and again. Using the juice of an onion is a simple way to do so. Just cut your onion in half and rub your gold jewellery thoroughly with one of the halves. Leave the juice to work its magic for about two hours, then rinse off your item of jewellery with water and polish it with a soft cloth. This works well though our test showed you need to make sure the onion and its juice really reach every part of your jewellery for it to be spotless.