Necklace for identification

[MrGray]

Hello to everyone and Happy New Year!

Couple of years ago I bought at an auction a bunch of pearl jewellery from a man who was selling his deceased grandmother's things. That included everything, from fakes to freshwater, couple of akoya pearl necklaces.
This one necklace that I can not be sure included 47 pearls measuring approximately 8.7 to 9.2 mm pearls which are all different in shape, from round, to near round, oval, button and bullet shape (I can responsibly say there are no egg or potato shape, the oval ones are like a button, spherical in different angle where they are drilled).
The necklace had a white gold clasp stamped 750 with a single sapphire (in the pictures is a necklace I made with an antique silver and rose cut diamonds clasp that I made from a pendant I had). Sure, I can include pictures of the original clasp.
I would appreciate if you could give your opinion.
Thank you.

 

[Pearl Dreams]

Can you look at this pearl close up-- is there a bead nucleus?
I'm leaning toward baroque akoyas.

 

[BWeaves]

Button shapes and colors make me think they are non-bead nucleated Chinese freshwater pearls.

 

[Pearl Dreams]

I thought that, too, but then I saw what I thought looked like a bead nucleus, and the high luster. But you may be right.

 

[ennui]

Button shapes and colors make me think they are non-bead nucleated Chinese freshwater pearls.

Me, too.