I've noticed a dark spot on my engagement ring that aligns with the bottom of my finger on the palm-side. The metal is 14k white gold. I figured it's normal wear-n-tear. I do wash it with warm water and dish soap once a week or so and I do intend to have it professionally cleaned before the wedding in October, but I wanted to see if anyone knew what this was and if there's something I can do at home.
Thank you in advance!
