Hi Olga,
In your top photo I would describe the pearls as a "drop shape" coin pearl. They are nucleated with a flat tear-drop shape+tissue. The second photo look like basic tissue-nucleated baroque freshwater pearls. Both have lovely color! Enjoy!
The fireballs are nucleated with a round shape+tissue, resulting in at least part of the pearl showing a very round shape, and a nacre "tail" (All you pearl experts please correct me if this isn't right, thanks!)
Thanks for the compliment, yes, my pearls do have a lot of colors.
In the column in blue printing on the left on the Home page, is a great explanation of Keshi pearls, a really excellent concise article.
Pattye
so many pearls, so little time