Cleaning your gold and gemstone jewelry couldn't be easier with white vinegar. Simply drop the jewelry into a jar of vinegar and let sit for 10 to15 minutes, agitating occasionally. Remove and scrub with a soft-bristled toothbrush, if necessary.
Dish soap
Pour about 3 drops of a mild dish soap into a bowl of warm water (you could also follow the rule of 1 drop per half glass of warm water). Stir to mix and then, place the gold jewellery in the solution for about 5-7 minutes depending on how tarnished it is.
Gold does tarnish and scratch over time. To preserve the luster of your gold jewelry, avoid exposure to household bleach and other cleaning products, which will quickly cause gold to discolor and possibly disintegrate.
Baking soda, salt and aluminum foil.
Mix one tablespoon salt and one tablespoon of baking soda and mix with one cup warm water. Pour into the dish. The mixture will create a chemical reaction with the foil and bubble as it cleans the jewelry. Rinse with cool water and buff dry with a clean cloth.
Dish Detergent & Warm Water
The best homemade jewelry cleaning solution is a mixture of a few drops of Dawn dish detergent in warm, not hot, water. Let the piece sit in the solution for a few minutes, longer if it's very dirty, then gently scrub with a new, baby-size, soft toothbrush.
Gold doesn't tarnish, but with constant exposure to sweat, body oils, make-up, and other chemical substances, it may become dull and sullied. The easiest method to give your gold back its unmistakable shine is to put your ornaments in a bowl of warm water with a dash of mild dish washing detergent.
Gold is an extremely soft metal and baking soda is an abrasive cleaner, says Franco. It will scratch ruin the finish and cause the plating to wear off.
In it's pure form, gold does not rust or tarnish as it does not combine with oxygen easily. This is why pure gold stays as shiny as it does. When it comes to gold jewelry, it is very rare to find pure gold jewelry pieces.
Never use toothpaste, baking soda, or a commercial metal cleaner on gold. If you use these abrasives, you may scratch the gold. Never use bleach.
Jewelers use ultrasonic cleaners with high frequency sound waves and chemicals, which create bubbles that latch on to the dirt on the diamond. The high frequency sound waves pull the dirt away from the stone and bring them up to the surface.
Toothpaste is abrasive and has a hardness of around 3/4 on the Mohs Scale of Hardness. Metals such as gold and silver are softer, so toothpaste can actually scratch damage your gold and silver jewellery. Not to mention, the chemicals in the flavour oils used in toothpaste are corrosive to metal.
Lemon Juice Is a Great Solution
Yes, it can be used as a brass and gold cleaner.
While the gold itself won't tarnish in water, the non-metals or alloy in it will. You can wear your 18k gold in the shower, but it's not advisable. Water won't damage the jewellery, but it may reduce the shine. If you keep exposing your 18k gold to water, its appearance will change over time.
Polishing Gold
Standard commercial gold polishes will quickly and safely clean gold jewelry when applied with a soft chamois cloth. If your gold jewelry has begun to tarnish, you can remove the tarnish by making a lukewarm water and dish soap mixture with just a few drops of ammonia.
A jeweller's cloth can be purchased easily at jewellery stores and supermarkets. All you need to do is take the jeweller's cloth and wipe the surface of your gold gently. This will give the gold a shine and polish.
Mix 1 teaspoon dishwashing liquid and 1 cup warm water. Add 1/2 teaspoon of ammonia based household cleaner (like a glass cleaner such as Windex) Soak your jewelry in the solution for about 5 minutes & then gently scrub with a soft-toothbrush. Air dry or carefully towel-dry with paper towel or regular cloth.
Mix 1/2 cup vinegar and two tablespoons of baking soda in a small bowl. Allow your jewelry to soak in the white vinegar and baking soda solution for a few hours. Then, rinse the jewelry with clean water and pat dry with a cotton cloth before storing your pieces away.
Assuming your ring is either just platinum, gold or silver and ONLY has diamonds, you can use Windex to clean it.
Chlorine is gold's worst enemy: with repeated exposure, chlorine will weaken your gold jewelry's structure and eventually lead to it breaking. Make sure to take your jewelry off before getting in a pool or spa. Cover or remove while cleaning: household cleaners with acids or abrasives will damage your jewelry's finish.