Mabe I can tell if they are real

I think all my other "Mabes" are actually Button pearls and they are gritty. I can't tell about these. The bottom of these are shell, but the top is NOT gritty and wierdly uniform. (There is some variation at the bottoms.). Are Mabe pearls gritty? (I would think so, even Tahitians are lightly gritty). Could they be a shell of a mussel coated in "paint"?

They look like Osmena pearls. They are the polished shell of the Nautilus and are not actually pearls.

Yes, Osmena, I agree with BWeaves. I haven't seen the drop shape before. Usually there are fine "ripple" lines on the tops that may show in person but perhaps don't show in these photos. Do you know if these are vintage?

They have a weird coating, which is probably why they are NOT gritty. I can't see the color variations like in natural shell. Learning tax.