Even if it happens rarely, it is still possible that stains appear on your beautiful stainless steel ring or pendant. In this case, rub with a little hot water and this wonderful powder to do everything that is baking soda (a tablespoon in ½ liter of water).
Rinse with warm water and dry with a soft (and clean) cloth.
Your steel jewels will keep all their luster if you dip them in hot vinegar, however respecting the precautions explained in the following paragraph.
A jewel is not necessarily made of stainless steel. Thus, your rings and pendants set with stones will not withstand contact with a hot liquid, which may alter the glue if necessary. It is better to work with unheated liquids or no liquid.