There are many things you can do to help keep your ring from corroding and turning your finger black.
Don’t wear your rings while using products that are naturally corrosive. Remove them before washing hands, showering, doing dishes, cleaning, swimming in the pool or ocean, and applying cosmetics or lotion. Wash your hands with soap to remove any residue after doing these things and allow them to completely dry, or lotion to totally absorb, before putting your rings back on.
If you live in an environment that is more humid, or your hands tend to be more sweaty, invest in an absorbent powder. You’ll want to use something that is super fine and free of abrasives. Apply it to your hands as often as needed to absorb the moisture before wearing your rings.
Create a barrier between your skin and your ring to both help limit corrosion and keep any corrosion present from affecting your skin. Use a jewelry lacquer or clear nail polish to apply a protective layer to the inside of your ring. These will need to be occasionally reapplied, but they are effective and won’t harm the ring.
White gold does not typically turn skin black because it is most often rhodium plated for a super white look. You can add a rhodium plating to the inside of your ring to get that same benefit. Depending on ring band width and size, this will cost about $30-$50. It will eventually wear off from the friction of being worn, so it will need to be replated periodically.
Consider switching to a higher karat gold such as 18k. The composition of an 18k gold ring is 75% pure gold and 25% alloy. A 14k gold ring has almost twice the amount of alloys at 42%. Or you could always go with platinum. Discoloration is unlikely to ever happen from a platinum ring.
Cleaning your ring will help remove any built up residue of dirt, sweat, and chemicals that react with the metals in your gold ring. You can clean your rings as often as you like as long as you’re using a safe method.
No matter whether you’re facing your gold ring turning your finger black for the first time or it’s been an ongoing concern, there are things you can do to restore your beautiful ring that leaves no trace of color on your finger. Just follow these tips and consult with a trusted jeweler if you have more questions.