So I recently bought a cheap pair of antique cufflinks. They look pretty good except for a few black spots on what I'm assuming is mother of pearl. Are these spots permanent? Is there a way to remove them? I see them pretty often on other MOP pieces as well.
Likely those are natural blemishes and the color is what it is, but it could also just be grime. You could wet a soft microfiber cloth and rub very lightly to see if it comes off. I would not soak them.