Here are my fuller answers, Pattye...
1. When you rub 2 pearls gently together, do they seem very smooth, or a just a bit gritty? (I like this better than the tooth test.)
Yes, they are just slightly gritty; there's a catching feel when I rub them together.
2. When you look closely around the drill holes, is there any peeling or flaking?
No, but there is crumpling, as you see in the photo above
3. Any dimples or partial rings around the pearls?
There are tiny dimples and bumps here and there, but not many... one per pearl or less, I'd say (though I didn't have the patience to examine each pearl in detail). and I couldn't find any partial rings--oh wait, there's what looks like it could be what you mean, I'll attach another photo. Right near the drill hole on the second one from the end.
4. Overall, when you look at the row of pearls, do they look all the same--
shiny and round? Or are there some slight differences from pearl to pearl?
A slight difference in color, or shape, or all the same?
Umm... they look pretty close to the same shape to me. Any differences are too small for me to detect.
5. Can you measure and give us approx mm size?
Rats, I don't have anything to measure with. They're big, though.