Just a second thought, taking another look at your photos, is there a jewelry store in your city that you could show these earring to? I am curious who told you they were natural pearls? The reason I ask is that in my collection of pins that are "pearls", most of mine are "real" pearls, most likely all cultured, but I have a few that are "faux" pearls, they look nearly identical to the cultured pearls, and they are mounted in the exact same way as your earrings, where as my cultured pearls pins have each pearl mounted on a post. Plus I just ordered a pin from an online seller calling it cultured pearls, again very similar, and they too were faux although lovely and well worth what I paid. I just really do want you to make sure these are indeed cultured pearls, as they did make some faux pearls that will produce a slight gritty feel on a tooth, especially the majorica company and others. It is really hard to tell in a photo as many of the very fine high quality faux pearls have a deceptive luster in photos. I think if you ask a jeweler if they are cultured or faux, most will more than glad to answer that question as long as you are not expecting them to appraise them. Plus if yours are real, they will view you as a potential customer for a matching necklace or ring. I think it is worth doing this so you will have a definitive answer. It is just the mounting that is a little troubling to me after examining my colllection again. They probably are cultured pearls, but I want you to get a correct evaluation.
Daddys Little Pearl