Yes, bleach will likely cause a reaction with fake gold (alloys or plated items) by tarnishing, discoloring, or corroding them, while pure gold should remain unaffected; however, it's a harsh test that risks damaging real gold alloys and is not recommended as it can destroy plated items, so a magnet test or professional appraisal is safer.
(Nearly all gold jewelry is alloyed, because pure gold is too soft on its own.) One study showed that when a 14K white gold ring was placed in common household bleach for 36 hours, the ring completely disintegrated!
Bleach. This is definitely a destructive test, so use with caution. File aa small section to get through any plating, and then leave the piece in the bleach for 15-30 minutes. If you see any kind of reaction, the piece is likely not genuine gold. Your mileage may vary, but we found that this can catch some fakes.
Unlike other metals, pure gold is very unreactive. It doesn't tarnish or fade, and it won't respond to everyday chemicals like bleach. But if gold is fake or mixed with other metals, a bleach test could reveal the truth.
To perform the test, place your gold item into a small bowl and add a few drops of white vinegar. Pure gold will not react or change color because it's non-reactive. Fake or low-quality gold, however, may turn black or green.
Pure gold is slightly reddish yellow in color, but colored gold can come in a variety of different colors by alloying it with different elements. Colored golds can be classified in three groups: Alloys with silver and copper in various proportions, producing white, yellow, green and red golds.
Baking soda, foil and salt also work to clean tarnished jewelry. Line a bowl with a sheet of aluminum foil with the shiny side up. Add the tarnished jewelry, as well as one cup of warm water, one tablespoon of salt, and one tablespoon of baking soda. Once the jewelry is clean, rinse and buff with a dry cloth.
Consistent Color: Pure gold has a rich, uniform color that doesn't fade. If you notice discoloration or patches where another metal is visible underneath, it's likely gold-plated. Durability: Real gold is resistant to tarnishing. If the piece shows signs of tarnish or rust, it's probably not pure gold.
Counterfeit gold may, however, exhibit discoloration, turning green or black due to a chemical reaction with the lighter flame. Residue: Real gold won't leave any residue behind after the lighter test.
Cleaning agents like bleach and chlorine can damage the gold jewelry and, over time, tarnish it. Our everyday grime, like soapy water, dish wash, laundry detergent, facewash, shower gel, etc., can also make gold jewelry lose its color.
In carats, 333 gold corresponds to 8 carats. However, only 33.3% of a piece of 333 gold jewelry consists of pure gold; the remaining 66.6% consists of other metals, such as copper, silver, zinc or tin.
Everyday Enemies: Understanding What Can Damage Gold Jewelry
Aqua Regia Solution. Aqua regia is a highly corrosive solution of hydrochloric acid (HCI) and nitric acid. The solution can dissolve many noble metals including gold and platinum, elements that are highly unreactive.
Yes, you can use bleach to test gold. Bleach can discolour fake gold as it is an oxidising agent that can cause metals like silver, copper, and fake gold alloys to tarnish or corrode. Real gold does not react with bleach.
By knowing the characteristics of real gold, you can be more careful in choosing and buying gold, both for investment and as jewelry. Real gold has guaranteed quality and a higher price compared to fake gold. In contrast, fake gold is usually made from a mixture of other metals that have low value.
Vinegar Test
This test simply requires that a few drops of vinegar be applied to the metal, hopefully in an inconspicuous place. If the metal is real gold there will be no change. If the metal is fake gold it will change color.
Methods to Test If Gold is Real at Home
Toothpaste and an old toothbrush or Q-tip.
This is a great option because the slightly gritty texture of the toothpaste works hard to remove even the toughest dirt. Rinse with cool water and buff dry with a clean cloth.
Generally speaking, high-quality gold-plated items can last anywhere from two to five years if cared for properly. However, lower-quality pieces might show signs of wear within months.
Mild Soap and Water Solution
This gentle mixture is a simple and safe way to clean most artificial jewellery, especially small pieces like earrings. Add a few drops of mild liquid soap to lukewarm water.