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.
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.
To clean diamonds, professional jewellers will use a specialised device referred to as an Ultrasonic Jewellery Cleansing Bath to get your piece sparkling once again. This device uses vibration and ultrasonic sound waves to lift the dirt and other pollutants off your diamond.
Tip. 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.
While vinegar is slightly acidic and needs to be used with caution on more porous stones, it will do a fabulous job on your diamond ring. Simply mix a half cup of white vinegar with 2 tablespoons of baking soda. Stir until the baking soda is totally dissolved, then soak your diamond ring in the solution for 2–3 hours.
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.
Vinegar is another popular at-home solution for cleaning. But like lemon juice, vinegar is very acidic and will cause damage to your soft stones and plated jewelry. Soaking your jewelry in a bowl of vinegar will remove the jewelry's shine and finish.
Ultrasonic cleaners are useful for jewelry cleaning and removing tarnish. They use ultrasound waves and chemicals combined to create bubbles that "cling" to the foreign particles such as dirt, oil, and unknown substances. The high frequency waves are sent out and pull the contaminants off the object.
Use dish soap and warm water for most metals, gems, and crystals. “Most jewelry, whether it's a diamond or rose quartz, can be safely cleaned with dish soap and warm water,” said McKenzie Santimer, museum manager and designer at the Gemological Institute of America.
Another great way to clean your sterling silver jewelry is with Windex. Yes… Windex. You can either spray the Windex directly on the item to be cleaned or on a soft-bristled toothbrush or soft cloth.
Combine Vinegar and Baking Soda: Mix 1/2 cup white vinegar and 2 Tbsp. baking soda together, then let your silver jewelry soak in the mixture for two to three hours before rinsing and polishing.
Here's how to clean jewelry with it: Soak your pure silver bracelets, rings, and other jewelry in a mixture of 1/2 cup white vinegar and 2 tablespoons baking soda for two to three hours. Rinse them under cold water and dry thoroughly with a soft cloth. Did you know you can also use vinegar in your laundry?
Toothpaste, baking soda, bleach, and other household cleaners are abrasive. While they won't damage your diamond, they can damage your gold. Windex won't hurt your ring, but it isn't a great cleaner either. So stick to mild soap and water, and six-month cleanings and check-ups at your jeweler.
"The best way to clean diamond rings is to make a solution with warm water (almost hot) and dishwashing soap. Soak your ring for about 20 to 40 minutes, gently brush the stone with a very soft toothbrush, and then rinse under warm running water," advises Mann. "If needed, repeat."
Although Windex shouldn't harm any hard gemstone, we seriously recommend using this method only for diamonds, and only for platinum, gold, and silver. Windex is an ammonia solution, and harmful to soft gemstones (for example, emeralds and pearls), so using it for anything else is just too big a risk of damage.
You can also fill a cup or glass with white vinegar, and drop your gold in it, let it soak for 5-8 minutes, take it out and rinse with water. If the metal has changed its color even slightly, then the gold is not pure but if it keeps shining, then the gold is pure.
Apply a few drops of white vinegar to your gold jewelry. Real gold will not change color, but vinegar can cause fake gold items to react and change color.