They are smooth drops without any rings/bumps etc (specified). They are set into the leaf collection settings (without the top hook parts). Will attach a pic showing the settings in a bit. Hence can't do anything to cover it!
Does the mark sit on the bottom of the pearl? In other words, is it noticeable when worn, or is it on the bottom side of the pearl? The photos show small on my monitor, so it's difficult to tell exactly what they look like.
I looked on PP to see the leaf collection setting. If they are not attached to the hook, (because you're going to use a different finding?) I don't understand why they cannot be rotated so that the blemish faces toward the back when worn.
Oh just realised you can't really see the leaf settings in that pic! I've temporarily attached the pearls to some tiny gold hoops I had so I can wear them for a few days before I have to send them off again!
If it's really deep and you ordered 3A, that would bother me a lot as well. Noticeable blemishes on Tahitians really bother me. That said, as it's on the bottom, no one will really see it unless they have their face in your ear.