Many people in the U.S. who buy solid gold jewelry—whether it's a necklace, ring, or bracelet—find themselves facing a frustrating issue. Within weeks of wearing their jewelry, they notice that the originally shiny gold begins to show discoloration. It may turn white, red, or even black, leaving them to wonder: “Did I buy fake gold?” or “Is this jewelry not solid gold after all?” Don’t panic—chances are, the discoloration has little to do with the purity of your gold, and everything to do with common daily habits.
Pure Gold Doesn’t Tarnish—But Surface Stains Do!
The first thing to understand is that pure gold, also known as 24K or solid gold, is chemically stable and won’t oxidize or rust at room temperature. So if your gold jewelry is changing color, the problem isn’t the gold itself but rather substances that come into contact with it. The discoloration you’re seeing is likely false discoloration—a surface issue that can often be fixed with a simple cleaning routine.
Let’s break down the most common types of discoloration and what causes them:
1. Why Does My Gold Turn White?
White spots or a white film on gold jewelry is a common issue, especially for those who use skincare products or sunscreen daily. Ingredients like zinc oxide and titanium dioxide, often found in sunscreens and moisturizers, can stick to the surface of your jewelry. Over time, this creates a white film that’s hard to remove with just a wipe.
Additionally, mercury from broken thermometers or blood pressure monitors can react with gold, forming a white spot called an amalgam. If you’re traveling to the beach, saltwater and minerals in seawater can also leave white crystals on your jewelry. This is especially common for people who visit beaches in places like Florida or Hawaii.
2. Why Does My Gold Turn Red?
Gold jewelry can turn red when the gold plating (if there is any) wears off, revealing the base metals underneath, such as copper or silver. Since pure gold is relatively soft, manufacturers often add other metals to make the jewelry more durable. When the gold plating wears down—whether from regular use or activities like working out or doing housework—the copper underneath may oxidize, causing a reddish tint.
Frequent exposure to hot springs, saunas, or even extreme temperatures can speed up this process, leading to red discoloration.
3. Why Does My Gold Turn Black?
Blackened gold is usually the result of a reaction between sulfides in the environment and the gold. Many foods that contain sulfur, like onions, garlic, and eggs, can leave sulfur compounds on your jewelry when you sweat. Additionally, certain sulfur-containing shampoos or even smoke from cigarettes can lead to this type of tarnishing.
For people who work in chemical plants or gas stations, the high concentration of sulfur in the air can accelerate the blackening of gold jewelry.
How to Fix Discoloration: Easy Cleaning Tips
If your solid gold jewelry has started to discolor, here are some easy ways to clean it and restore its shine:
- For White Spots (e.g., sunscreen residue or mercury):
- Soak the jewelry in rubbing alcohol for about 10 minutes.
- Gently scrub with a soft-bristled brush, then rinse with clean water and dry.
- For Red Marks (exposed copper or oxidation):
- Apply a small amount of toothpaste to a soft cloth and gently rub the affected area.
- Rinse the jewelry thoroughly with warm water to remove the toothpaste and oxide layer.
- For Black Stains (sulfide buildup):
- Mix warm water with a bit of salt and baking soda in a bowl.
- Soak the jewelry for 15-20 minutes, then scrub with a soft brush to remove the blackening.
How to Prevent Discoloration of Gold Jewelry
While cleaning methods can help, the best approach is prevention. Here are some tips to protect your gold jewelry from discoloring in the first place:
- Apply skincare products and sunscreen before wearing your jewelry, not after.
- Remove jewelry before swimming, working out, or doing chores to avoid exposure to chemicals or sweat.
- Wipe down your jewelry regularly with a soft cloth to remove dust, sweat, and other residues.
- Store jewelry in a dry, safe place like a jewelry box to avoid contact with cosmetics or toiletries.
When to Contact the Jeweler
If you’ve tried cleaning your jewelry and the discoloration persists—or if the weight of the jewelry seems off—it might be worth contacting the store where you purchased it for inspection. The discoloration may be a sign of a deeper issue, such as poor craftsmanship or an impure alloy.
Conclusion
Next time your solid gold jewelry starts to turn white, red, or black, don’t jump to conclusions about its purity. Discoloration is usually caused by surface reactions with chemicals, sweat, or environmental factors, and it can often be cleaned or prevented with simple care routines. By understanding what causes discoloration and how to maintain your jewelry, you can keep it looking as beautiful as the day you bought it.
